21112575

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{163}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 38557056

約数和(自身を除く): 17444481

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 157, 163, 165, 275, 471, 489, 785, 815, 825, 1727, 1793, 2355, 2445, 3925, 4075, 5181, 5379, 8635, 8965, 11775, 12225, 25591, 25905, 26895, 43175, 44825, 76773, 127955, 129525, 134475, 281501, 383865, 639775, 844503, 1407505, 1919325, 4222515, 7037525, 21112575]

約数ペア:

[(1, 21112575), (3, 7037525), (5, 4222515), (11, 1919325), (15, 1407505), (25, 844503), (33, 639775), (55, 383865), (75, 281501), (157, 134475), (163, 129525), (165, 127955), (275, 76773), (471, 44825), (489, 43175), (785, 26895), (815, 25905), (825, 25591), (1727, 12225), (1793, 11775), (2355, 8965), (2445, 8635), (3925, 5379), (4075, 5181)]