21131500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{3251}}^1$

素因数の和:3283

約数の個数: 48

約数和(自身を含む): 49716576

約数和(自身を除く): 28585076

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 650, 1300, 1625, 3250, 3251, 6500, 6502, 13004, 16255, 32510, 42263, 65020, 81275, 84526, 162550, 169052, 211315, 325100, 406375, 422630, 812750, 845260, 1056575, 1625500, 2113150, 4226300, 5282875, 10565750, 21131500]

約数ペア:

[(1, 21131500), (2, 10565750), (4, 5282875), (5, 4226300), (10, 2113150), (13, 1625500), (20, 1056575), (25, 845260), (26, 812750), (50, 422630), (52, 406375), (65, 325100), (100, 211315), (125, 169052), (130, 162550), (250, 84526), (260, 81275), (325, 65020), (500, 42263), (650, 32510), (1300, 16255), (1625, 13004), (3250, 6502), (3251, 6500)]