21269875

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{499}}^1$

素因数の和:556

約数の個数: 32

約数和(自身を含む): 29952000

約数和(自身を除く): 8682125

約数列:

[1, 5, 11, 25, 31, 55, 125, 155, 275, 341, 499, 775, 1375, 1705, 2495, 3875, 5489, 8525, 12475, 15469, 27445, 42625, 62375, 77345, 137225, 170159, 386725, 686125, 850795, 1933625, 4253975, 21269875]

約数ペア:

[(1, 21269875), (5, 4253975), (11, 1933625), (25, 850795), (31, 686125), (55, 386725), (125, 170159), (155, 137225), (275, 77345), (341, 62375), (499, 42625), (775, 27445), (1375, 15469), (1705, 12475), (2495, 8525), (3875, 5489)]