21857440

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1129}}^1$

素因数の和:1166

約数の個数: 72

約数和(自身を含む): 56809620

約数和(自身を除く): 34952180

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 121, 160, 176, 220, 242, 352, 440, 484, 605, 880, 968, 1129, 1210, 1760, 1936, 2258, 2420, 3872, 4516, 4840, 5645, 9032, 9680, 11290, 12419, 18064, 19360, 22580, 24838, 36128, 45160, 49676, 62095, 90320, 99352, 124190, 136609, 180640, 198704, 248380, 273218, 397408, 496760, 546436, 683045, 993520, 1092872, 1366090, 1987040, 2185744, 2732180, 4371488, 5464360, 10928720, 21857440]

約数ペア:

[(1, 21857440), (2, 10928720), (4, 5464360), (5, 4371488), (8, 2732180), (10, 2185744), (11, 1987040), (16, 1366090), (20, 1092872), (22, 993520), (32, 683045), (40, 546436), (44, 496760), (55, 397408), (80, 273218), (88, 248380), (110, 198704), (121, 180640), (160, 136609), (176, 124190), (220, 99352), (242, 90320), (352, 62095), (440, 49676), (484, 45160), (605, 36128), (880, 24838), (968, 22580), (1129, 19360), (1210, 18064), (1760, 12419), (1936, 11290), (2258, 9680), (2420, 9032), (3872, 5645), (4516, 4840)]