20713980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{331}}^1$

素因数の和:499

約数の個数: 96

約数和(自身を含む): 66931200

約数和(自身を除く): 46217220

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 149, 210, 298, 331, 420, 447, 596, 662, 745, 894, 993, 1043, 1324, 1490, 1655, 1788, 1986, 2086, 2235, 2317, 2980, 3129, 3310, 3972, 4172, 4470, 4634, 4965, 5215, 6258, 6620, 6951, 8940, 9268, 9930, 10430, 11585, 12516, 13902, 15645, 19860, 20860, 23170, 27804, 31290, 34755, 46340, 49319, 62580, 69510, 98638, 139020, 147957, 197276, 246595, 295914, 345233, 493190, 591828, 690466, 739785, 986380, 1035699, 1380932, 1479570, 1726165, 2071398, 2959140, 3452330, 4142796, 5178495, 6904660, 10356990, 20713980]

約数ペア:

[(1, 20713980), (2, 10356990), (3, 6904660), (4, 5178495), (5, 4142796), (6, 3452330), (7, 2959140), (10, 2071398), (12, 1726165), (14, 1479570), (15, 1380932), (20, 1035699), (21, 986380), (28, 739785), (30, 690466), (35, 591828), (42, 493190), (60, 345233), (70, 295914), (84, 246595), (105, 197276), (140, 147957), (149, 139020), (210, 98638), (298, 69510), (331, 62580), (420, 49319), (447, 46340), (596, 34755), (662, 31290), (745, 27804), (894, 23170), (993, 20860), (1043, 19860), (1324, 15645), (1490, 13902), (1655, 12516), (1788, 11585), (1986, 10430), (2086, 9930), (2235, 9268), (2317, 8940), (2980, 6951), (3129, 6620), (3310, 6258), (3972, 5215), (4172, 4965), (4470, 4634)]