256989320

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{18731}}^1$

素因数の和:18763

約数の個数: 64

約数和(自身を含む): 674352000

約数和(自身を除く): 417362680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1372, 1715, 1960, 2744, 3430, 6860, 13720, 18731, 37462, 74924, 93655, 131117, 149848, 187310, 262234, 374620, 524468, 655585, 749240, 917819, 1048936, 1311170, 1835638, 2622340, 3671276, 4589095, 5244680, 6424733, 7342552, 9178190, 12849466, 18356380, 25698932, 32123665, 36712760, 51397864, 64247330, 128494660, 256989320]

約数ペア:

[(1, 256989320), (2, 128494660), (4, 64247330), (5, 51397864), (7, 36712760), (8, 32123665), (10, 25698932), (14, 18356380), (20, 12849466), (28, 9178190), (35, 7342552), (40, 6424733), (49, 5244680), (56, 4589095), (70, 3671276), (98, 2622340), (140, 1835638), (196, 1311170), (245, 1048936), (280, 917819), (343, 749240), (392, 655585), (490, 524468), (686, 374620), (980, 262234), (1372, 187310), (1715, 149848), (1960, 131117), (2744, 93655), (3430, 74924), (6860, 37462), (13720, 18731)]