21136420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{467}}^1$

素因数の和:580

約数の個数: 48

約数和(自身を含む): 46545408

約数和(自身を除く): 25408988

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 73, 124, 146, 155, 292, 310, 365, 467, 620, 730, 934, 1460, 1868, 2263, 2335, 4526, 4670, 9052, 9340, 11315, 14477, 22630, 28954, 34091, 45260, 57908, 68182, 72385, 136364, 144770, 170455, 289540, 340910, 681820, 1056821, 2113642, 4227284, 5284105, 10568210, 21136420]

約数ペア:

[(1, 21136420), (2, 10568210), (4, 5284105), (5, 4227284), (10, 2113642), (20, 1056821), (31, 681820), (62, 340910), (73, 289540), (124, 170455), (146, 144770), (155, 136364), (292, 72385), (310, 68182), (365, 57908), (467, 45260), (620, 34091), (730, 28954), (934, 22630), (1460, 14477), (1868, 11315), (2263, 9340), (2335, 9052), (4526, 4670)]