21110575

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{127}}^1$

素因数の和:307

約数の個数: 24

約数和(自身を含む): 27061760

約数和(自身を除く): 5951185

約数列:

[1, 5, 25, 61, 109, 127, 305, 545, 635, 1525, 2725, 3175, 6649, 7747, 13843, 33245, 38735, 69215, 166225, 193675, 346075, 844423, 4222115, 21110575]

約数ペア:

[(1, 21110575), (5, 4222115), (25, 844423), (61, 346075), (109, 193675), (127, 166225), (305, 69215), (545, 38735), (635, 33245), (1525, 13843), (2725, 7747), (3175, 6649)]