20098280

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8237}}^1$

素因数の和:8309

約数の個数: 32

約数和(自身を含む): 45968040

約数和(自身を除く): 25869760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8237, 16474, 32948, 41185, 65896, 82370, 164740, 329480, 502457, 1004914, 2009828, 2512285, 4019656, 5024570, 10049140, 20098280]

約数ペア:

[(1, 20098280), (2, 10049140), (4, 5024570), (5, 4019656), (8, 2512285), (10, 2009828), (20, 1004914), (40, 502457), (61, 329480), (122, 164740), (244, 82370), (305, 65896), (488, 41185), (610, 32948), (1220, 16474), (2440, 8237)]