21717025

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{503}}^1$

素因数の和:681

約数の個数: 24

約数和(自身を含む): 29623104

約数和(自身を除く): 7906079

約数列:

[1, 5, 11, 25, 55, 157, 275, 503, 785, 1727, 2515, 3925, 5533, 8635, 12575, 27665, 43175, 78971, 138325, 394855, 868681, 1974275, 4343405, 21717025]

約数ペア:

[(1, 21717025), (5, 4343405), (11, 1974275), (25, 868681), (55, 394855), (157, 138325), (275, 78971), (503, 43175), (785, 27665), (1727, 12575), (2515, 8635), (3925, 5533)]