21431740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1597}}^1$

素因数の和:1678

約数の個数: 48

約数和(自身を含む): 49934304

約数和(自身を除く): 28502564

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1597, 2684, 3194, 3355, 6388, 6710, 7985, 13420, 15970, 17567, 31940, 35134, 70268, 87835, 97417, 175670, 194834, 351340, 389668, 487085, 974170, 1071587, 1948340, 2143174, 4286348, 5357935, 10715870, 21431740]

約数ペア:

[(1, 21431740), (2, 10715870), (4, 5357935), (5, 4286348), (10, 2143174), (11, 1948340), (20, 1071587), (22, 974170), (44, 487085), (55, 389668), (61, 351340), (110, 194834), (122, 175670), (220, 97417), (244, 87835), (305, 70268), (610, 35134), (671, 31940), (1220, 17567), (1342, 15970), (1597, 13420), (2684, 7985), (3194, 6710), (3355, 6388)]