20390560

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4111}}^1$

素因数の和:4157

約数の個数: 48

約数和(自身を含む): 49738752

約数和(自身を除く): 29348192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4111, 4960, 8222, 16444, 20555, 32888, 41110, 65776, 82220, 127441, 131552, 164440, 254882, 328880, 509764, 637205, 657760, 1019528, 1274410, 2039056, 2548820, 4078112, 5097640, 10195280, 20390560]

約数ペア:

[(1, 20390560), (2, 10195280), (4, 5097640), (5, 4078112), (8, 2548820), (10, 2039056), (16, 1274410), (20, 1019528), (31, 657760), (32, 637205), (40, 509764), (62, 328880), (80, 254882), (124, 164440), (155, 131552), (160, 127441), (248, 82220), (310, 65776), (496, 41110), (620, 32888), (992, 20555), (1240, 16444), (2480, 8222), (4111, 4960)]