18255320

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 42768000

約数和(自身を除く): 24512680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 79, 106, 109, 158, 212, 218, 265, 316, 395, 424, 436, 530, 545, 632, 790, 872, 1060, 1090, 1580, 2120, 2180, 3160, 4187, 4360, 5777, 8374, 8611, 11554, 16748, 17222, 20935, 23108, 28885, 33496, 34444, 41870, 43055, 46216, 57770, 68888, 83740, 86110, 115540, 167480, 172220, 231080, 344440, 456383, 912766, 1825532, 2281915, 3651064, 4563830, 9127660, 18255320]

約数ペア:

[(1, 18255320), (2, 9127660), (4, 4563830), (5, 3651064), (8, 2281915), (10, 1825532), (20, 912766), (40, 456383), (53, 344440), (79, 231080), (106, 172220), (109, 167480), (158, 115540), (212, 86110), (218, 83740), (265, 68888), (316, 57770), (395, 46216), (424, 43055), (436, 41870), (530, 34444), (545, 33496), (632, 28885), (790, 23108), (872, 20935), (1060, 17222), (1090, 16748), (1580, 11554), (2120, 8611), (2180, 8374), (3160, 5777), (4187, 4360)]