648778868

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{191}}^1\times {\mathrm{389}}^1$

素因数の和:680

約数の個数: 48

約数和(自身を含む): 1195084800

約数和(自身を除く): 546305932

約数列:

[1, 2, 4, 37, 59, 74, 118, 148, 191, 236, 382, 389, 764, 778, 1556, 2183, 4366, 7067, 8732, 11269, 14134, 14393, 22538, 22951, 28268, 28786, 45076, 45902, 57572, 74299, 91804, 148598, 297196, 416953, 833906, 849187, 1667812, 1698374, 2749063, 3396748, 4383641, 5498126, 8767282, 10996252, 17534564, 162194717, 324389434, 648778868]

約数ペア:

[(1, 648778868), (2, 324389434), (4, 162194717), (37, 17534564), (59, 10996252), (74, 8767282), (118, 5498126), (148, 4383641), (191, 3396748), (236, 2749063), (382, 1698374), (389, 1667812), (764, 849187), (778, 833906), (1556, 416953), (2183, 297196), (4366, 148598), (7067, 91804), (8732, 74299), (11269, 57572), (14134, 45902), (14393, 45076), (22538, 28786), (22951, 28268)]