20528740

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{607}}^1$

素因数の和:724

約数の個数: 48

約数和(自身を含む): 45964800

約数和(自身を除く): 25436060

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 89, 95, 178, 190, 356, 380, 445, 607, 890, 1214, 1691, 1780, 2428, 3035, 3382, 6070, 6764, 8455, 11533, 12140, 16910, 23066, 33820, 46132, 54023, 57665, 108046, 115330, 216092, 230660, 270115, 540230, 1026437, 1080460, 2052874, 4105748, 5132185, 10264370, 20528740]

約数ペア:

[(1, 20528740), (2, 10264370), (4, 5132185), (5, 4105748), (10, 2052874), (19, 1080460), (20, 1026437), (38, 540230), (76, 270115), (89, 230660), (95, 216092), (178, 115330), (190, 108046), (356, 57665), (380, 54023), (445, 46132), (607, 33820), (890, 23066), (1214, 16910), (1691, 12140), (1780, 11533), (2428, 8455), (3035, 6764), (3382, 6070)]