21044140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2791}}^1$

素因数の和:2842

約数の個数: 48

約数和(自身を含む): 49250880

約数和(自身を除く): 28206740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 260, 290, 377, 580, 754, 1508, 1885, 2791, 3770, 5582, 7540, 11164, 13955, 27910, 36283, 55820, 72566, 80939, 145132, 161878, 181415, 323756, 362830, 404695, 725660, 809390, 1052207, 1618780, 2104414, 4208828, 5261035, 10522070, 21044140]

約数ペア:

[(1, 21044140), (2, 10522070), (4, 5261035), (5, 4208828), (10, 2104414), (13, 1618780), (20, 1052207), (26, 809390), (29, 725660), (52, 404695), (58, 362830), (65, 323756), (116, 181415), (130, 161878), (145, 145132), (260, 80939), (290, 72566), (377, 55820), (580, 36283), (754, 27910), (1508, 13955), (1885, 11164), (2791, 7540), (3770, 5582)]