21706020

素因数分解:

$2^2\times 3^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{107}}^1$

素因数の和:159

約数の個数: 216

約数和(自身を含む): 80668224

約数和(自身を除く): 58962204

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 23, 28, 30, 35, 36, 42, 45, 46, 49, 60, 63, 69, 70, 84, 90, 92, 98, 105, 107, 115, 126, 138, 140, 147, 161, 180, 196, 207, 210, 214, 230, 245, 252, 276, 294, 315, 321, 322, 345, 414, 420, 428, 441, 460, 483, 490, 535, 588, 630, 642, 644, 690, 735, 749, 805, 828, 882, 963, 966, 980, 1035, 1070, 1127, 1260, 1284, 1380, 1449, 1470, 1498, 1605, 1610, 1764, 1926, 1932, 2070, 2140, 2205, 2247, 2254, 2415, 2461, 2898, 2940, 2996, 3210, 3220, 3381, 3745, 3852, 4140, 4410, 4494, 4508, 4815, 4830, 4922, 5243, 5635, 5796, 6420, 6741, 6762, 7245, 7383, 7490, 8820, 8988, 9630, 9660, 9844, 10143, 10486, 11235, 11270, 12305, 13482, 13524, 14490, 14766, 14980, 15729, 16905, 17227, 19260, 20286, 20972, 22149, 22470, 22540, 24610, 26215, 26964, 28980, 29532, 31458, 33705, 33810, 34454, 36915, 40572, 44298, 44940, 47187, 49220, 50715, 51681, 52430, 62916, 67410, 67620, 68908, 73830, 78645, 86135, 88596, 94374, 101430, 103362, 104860, 110745, 120589, 134820, 147660, 155043, 157290, 172270, 188748, 202860, 206724, 221490, 235935, 241178, 258405, 310086, 314580, 344540, 361767, 442980, 471870, 482356, 516810, 602945, 620172, 723534, 775215, 943740, 1033620, 1085301, 1205890, 1447068, 1550430, 1808835, 2170602, 2411780, 3100860, 3617670, 4341204, 5426505, 7235340, 10853010, 21706020]

約数ペア:

[(1, 21706020), (2, 10853010), (3, 7235340), (4, 5426505), (5, 4341204), (6, 3617670), (7, 3100860), (9, 2411780), (10, 2170602), (12, 1808835), (14, 1550430), (15, 1447068), (18, 1205890), (20, 1085301), (21, 1033620), (23, 943740), (28, 775215), (30, 723534), (35, 620172), (36, 602945), (42, 516810), (45, 482356), (46, 471870), (49, 442980), (60, 361767), (63, 344540), (69, 314580), (70, 310086), (84, 258405), (90, 241178), (92, 235935), (98, 221490), (105, 206724), (107, 202860), (115, 188748), (126, 172270), (138, 157290), (140, 155043), (147, 147660), (161, 134820), (180, 120589), (196, 110745), (207, 104860), (210, 103362), (214, 101430), (230, 94374), (245, 88596), (252, 86135), (276, 78645), (294, 73830), (315, 68908), (321, 67620), (322, 67410), (345, 62916), (414, 52430), (420, 51681), (428, 50715), (441, 49220), (460, 47187), (483, 44940), (490, 44298), (535, 40572), (588, 36915), (630, 34454), (642, 33810), (644, 33705), (690, 31458), (735, 29532), (749, 28980), (805, 26964), (828, 26215), (882, 24610), (963, 22540), (966, 22470), (980, 22149), (1035, 20972), (1070, 20286), (1127, 19260), (1260, 17227), (1284, 16905), (1380, 15729), (1449, 14980), (1470, 14766), (1498, 14490), (1605, 13524), (1610, 13482), (1764, 12305), (1926, 11270), (1932, 11235), (2070, 10486), (2140, 10143), (2205, 9844), (2247, 9660), (2254, 9630), (2415, 8988), (2461, 8820), (2898, 7490), (2940, 7383), (2996, 7245), (3210, 6762), (3220, 6741), (3381, 6420), (3745, 5796), (3852, 5635), (4140, 5243), (4410, 4922), (4494, 4830), (4508, 4815)]