21007675

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1747}}^1$

素因数の和:1807

約数の個数: 24

約数和(自身を含む): 28828016

約数和(自身を除く): 7820341

約数列:

[1, 5, 13, 25, 37, 65, 185, 325, 481, 925, 1747, 2405, 8735, 12025, 22711, 43675, 64639, 113555, 323195, 567775, 840307, 1615975, 4201535, 21007675]

約数ペア:

[(1, 21007675), (5, 4201535), (13, 1615975), (25, 840307), (37, 567775), (65, 323195), (185, 113555), (325, 64639), (481, 43675), (925, 22711), (1747, 12025), (2405, 8735)]