78972820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{359}}^1\times {\mathrm{647}}^1$

素因数の和:1032

約数の個数: 48

約数和(自身を含む): 176359680

約数和(自身を除く): 97386860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 359, 647, 718, 1294, 1436, 1795, 2588, 3235, 3590, 6103, 6470, 7180, 10999, 12206, 12940, 21998, 24412, 30515, 43996, 54995, 61030, 109990, 122060, 219980, 232273, 464546, 929092, 1161365, 2322730, 3948641, 4645460, 7897282, 15794564, 19743205, 39486410, 78972820]

約数ペア:

[(1, 78972820), (2, 39486410), (4, 19743205), (5, 15794564), (10, 7897282), (17, 4645460), (20, 3948641), (34, 2322730), (68, 1161365), (85, 929092), (170, 464546), (340, 232273), (359, 219980), (647, 122060), (718, 109990), (1294, 61030), (1436, 54995), (1795, 43996), (2588, 30515), (3235, 24412), (3590, 21998), (6103, 12940), (6470, 12206), (7180, 10999)]