21742775

素因数分解:

$5^2\times {\mathrm{79}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:299

約数の個数: 24

約数和(自身を含む): 27825600

約数和(自身を除く): 6082825

約数列:

[1, 5, 25, 79, 101, 109, 395, 505, 545, 1975, 2525, 2725, 7979, 8611, 11009, 39895, 43055, 55045, 199475, 215275, 275225, 869711, 4348555, 21742775]

約数ペア:

[(1, 21742775), (5, 4348555), (25, 869711), (79, 275225), (101, 215275), (109, 199475), (395, 55045), (505, 43055), (545, 39895), (1975, 11009), (2525, 8611), (2725, 7979)]