20564380

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{131}}^1\times {\mathrm{167}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 44706816

約数和(自身を除く): 24142436

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 131, 167, 188, 235, 262, 334, 470, 524, 655, 668, 835, 940, 1310, 1670, 2620, 3340, 6157, 7849, 12314, 15698, 21877, 24628, 30785, 31396, 39245, 43754, 61570, 78490, 87508, 109385, 123140, 156980, 218770, 437540, 1028219, 2056438, 4112876, 5141095, 10282190, 20564380]

約数ペア:

[(1, 20564380), (2, 10282190), (4, 5141095), (5, 4112876), (10, 2056438), (20, 1028219), (47, 437540), (94, 218770), (131, 156980), (167, 123140), (188, 109385), (235, 87508), (262, 78490), (334, 61570), (470, 43754), (524, 39245), (655, 31396), (668, 30785), (835, 24628), (940, 21877), (1310, 15698), (1670, 12314), (2620, 7849), (3340, 6157)]