20989020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{379}}^1$

素因数の和:475

約数の個数: 96

約数和(自身を含む): 64350720

約数和(自身を除く): 43361700

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 71, 78, 130, 142, 156, 195, 213, 260, 284, 355, 379, 390, 426, 710, 758, 780, 852, 923, 1065, 1137, 1420, 1516, 1846, 1895, 2130, 2274, 2769, 3692, 3790, 4260, 4548, 4615, 4927, 5538, 5685, 7580, 9230, 9854, 11076, 11370, 13845, 14781, 18460, 19708, 22740, 24635, 26909, 27690, 29562, 49270, 53818, 55380, 59124, 73905, 80727, 98540, 107636, 134545, 147810, 161454, 269090, 295620, 322908, 349817, 403635, 538180, 699634, 807270, 1049451, 1399268, 1614540, 1749085, 2098902, 3498170, 4197804, 5247255, 6996340, 10494510, 20989020]

約数ペア:

[(1, 20989020), (2, 10494510), (3, 6996340), (4, 5247255), (5, 4197804), (6, 3498170), (10, 2098902), (12, 1749085), (13, 1614540), (15, 1399268), (20, 1049451), (26, 807270), (30, 699634), (39, 538180), (52, 403635), (60, 349817), (65, 322908), (71, 295620), (78, 269090), (130, 161454), (142, 147810), (156, 134545), (195, 107636), (213, 98540), (260, 80727), (284, 73905), (355, 59124), (379, 55380), (390, 53818), (426, 49270), (710, 29562), (758, 27690), (780, 26909), (852, 24635), (923, 22740), (1065, 19708), (1137, 18460), (1420, 14781), (1516, 13845), (1846, 11370), (1895, 11076), (2130, 9854), (2274, 9230), (2769, 7580), (3692, 5685), (3790, 5538), (4260, 4927), (4548, 4615)]