21604920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:189

約数の個数: 128

約数和(自身を含む): 68428800

約数和(自身を除く): 46823880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 43, 53, 60, 79, 86, 106, 120, 129, 158, 159, 172, 212, 215, 237, 258, 265, 316, 318, 344, 395, 424, 430, 474, 516, 530, 632, 636, 645, 790, 795, 860, 948, 1032, 1060, 1185, 1272, 1290, 1580, 1590, 1720, 1896, 2120, 2279, 2370, 2580, 3160, 3180, 3397, 4187, 4558, 4740, 5160, 6360, 6794, 6837, 8374, 9116, 9480, 10191, 11395, 12561, 13588, 13674, 16748, 16985, 18232, 20382, 20935, 22790, 25122, 27176, 27348, 33496, 33970, 34185, 40764, 41870, 45580, 50244, 50955, 54696, 62805, 67940, 68370, 81528, 83740, 91160, 100488, 101910, 125610, 135880, 136740, 167480, 180041, 203820, 251220, 273480, 360082, 407640, 502440, 540123, 720164, 900205, 1080246, 1440328, 1800410, 2160492, 2700615, 3600820, 4320984, 5401230, 7201640, 10802460, 21604920]

約数ペア:

[(1, 21604920), (2, 10802460), (3, 7201640), (4, 5401230), (5, 4320984), (6, 3600820), (8, 2700615), (10, 2160492), (12, 1800410), (15, 1440328), (20, 1080246), (24, 900205), (30, 720164), (40, 540123), (43, 502440), (53, 407640), (60, 360082), (79, 273480), (86, 251220), (106, 203820), (120, 180041), (129, 167480), (158, 136740), (159, 135880), (172, 125610), (212, 101910), (215, 100488), (237, 91160), (258, 83740), (265, 81528), (316, 68370), (318, 67940), (344, 62805), (395, 54696), (424, 50955), (430, 50244), (474, 45580), (516, 41870), (530, 40764), (632, 34185), (636, 33970), (645, 33496), (790, 27348), (795, 27176), (860, 25122), (948, 22790), (1032, 20935), (1060, 20382), (1185, 18232), (1272, 16985), (1290, 16748), (1580, 13674), (1590, 13588), (1720, 12561), (1896, 11395), (2120, 10191), (2279, 9480), (2370, 9116), (2580, 8374), (3160, 6837), (3180, 6794), (3397, 6360), (4187, 5160), (4558, 4740)]