20782520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{317}}^1$

素因数の和:488

約数の個数: 64

約数和(自身を含む): 51516000

約数和(自身を除く): 30733480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 149, 220, 298, 317, 440, 596, 634, 745, 1192, 1268, 1490, 1585, 1639, 2536, 2980, 3170, 3278, 3487, 5960, 6340, 6556, 6974, 8195, 12680, 13112, 13948, 16390, 17435, 27896, 32780, 34870, 47233, 65560, 69740, 94466, 139480, 188932, 236165, 377864, 472330, 519563, 944660, 1039126, 1889320, 2078252, 2597815, 4156504, 5195630, 10391260, 20782520]

約数ペア:

[(1, 20782520), (2, 10391260), (4, 5195630), (5, 4156504), (8, 2597815), (10, 2078252), (11, 1889320), (20, 1039126), (22, 944660), (40, 519563), (44, 472330), (55, 377864), (88, 236165), (110, 188932), (149, 139480), (220, 94466), (298, 69740), (317, 65560), (440, 47233), (596, 34870), (634, 32780), (745, 27896), (1192, 17435), (1268, 16390), (1490, 13948), (1585, 13112), (1639, 12680), (2536, 8195), (2980, 6974), (3170, 6556), (3278, 6340), (3487, 5960)]