21391860

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{53}}^1$

素因数の和:134

約数の個数: 144

約数和(自身を含む): 72067968

約数和(自身を除く): 50676108

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 31, 35, 42, 53, 60, 62, 70, 84, 93, 105, 106, 124, 140, 155, 159, 186, 210, 212, 217, 265, 310, 318, 371, 372, 420, 434, 465, 530, 620, 636, 651, 742, 795, 868, 930, 961, 1060, 1085, 1113, 1302, 1484, 1590, 1643, 1855, 1860, 1922, 2170, 2226, 2604, 2883, 3180, 3255, 3286, 3710, 3844, 4340, 4452, 4805, 4929, 5565, 5766, 6510, 6572, 6727, 7420, 8215, 9610, 9858, 11130, 11501, 11532, 13020, 13454, 14415, 16430, 19220, 19716, 20181, 22260, 23002, 24645, 26908, 28830, 32860, 33635, 34503, 40362, 46004, 49290, 50933, 57505, 57660, 67270, 69006, 80724, 98580, 100905, 101866, 115010, 134540, 138012, 152799, 172515, 201810, 203732, 230020, 254665, 305598, 345030, 356531, 403620, 509330, 611196, 690060, 713062, 763995, 1018660, 1069593, 1426124, 1527990, 1782655, 2139186, 3055980, 3565310, 4278372, 5347965, 7130620, 10695930, 21391860]

約数ペア:

[(1, 21391860), (2, 10695930), (3, 7130620), (4, 5347965), (5, 4278372), (6, 3565310), (7, 3055980), (10, 2139186), (12, 1782655), (14, 1527990), (15, 1426124), (20, 1069593), (21, 1018660), (28, 763995), (30, 713062), (31, 690060), (35, 611196), (42, 509330), (53, 403620), (60, 356531), (62, 345030), (70, 305598), (84, 254665), (93, 230020), (105, 203732), (106, 201810), (124, 172515), (140, 152799), (155, 138012), (159, 134540), (186, 115010), (210, 101866), (212, 100905), (217, 98580), (265, 80724), (310, 69006), (318, 67270), (371, 57660), (372, 57505), (420, 50933), (434, 49290), (465, 46004), (530, 40362), (620, 34503), (636, 33635), (651, 32860), (742, 28830), (795, 26908), (868, 24645), (930, 23002), (961, 22260), (1060, 20181), (1085, 19716), (1113, 19220), (1302, 16430), (1484, 14415), (1590, 13454), (1643, 13020), (1855, 11532), (1860, 11501), (1922, 11130), (2170, 9858), (2226, 9610), (2604, 8215), (2883, 7420), (3180, 6727), (3255, 6572), (3286, 6510), (3710, 5766), (3844, 5565), (4340, 4929), (4452, 4805)]