21667580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{661}}^1$

素因数の和:830

約数の個数: 48

約数和(自身を含む): 50047200

約数和(自身を除く): 28379620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 149, 220, 298, 596, 661, 745, 1322, 1490, 1639, 2644, 2980, 3278, 3305, 6556, 6610, 7271, 8195, 13220, 14542, 16390, 29084, 32780, 36355, 72710, 98489, 145420, 196978, 393956, 492445, 984890, 1083379, 1969780, 2166758, 4333516, 5416895, 10833790, 21667580]

約数ペア:

[(1, 21667580), (2, 10833790), (4, 5416895), (5, 4333516), (10, 2166758), (11, 1969780), (20, 1083379), (22, 984890), (44, 492445), (55, 393956), (110, 196978), (149, 145420), (220, 98489), (298, 72710), (596, 36355), (661, 32780), (745, 29084), (1322, 16390), (1490, 14542), (1639, 13220), (2644, 8195), (2980, 7271), (3278, 6610), (3305, 6556)]