21488705

素因数分解:

$5^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{631}}^1$

素因数の和:789

約数の個数: 24

約数和(自身を含む): 30260160

約数和(自身を除く): 8771455

約数列:

[1, 5, 7, 35, 49, 139, 245, 631, 695, 973, 3155, 4417, 4865, 6811, 22085, 30919, 34055, 87709, 154595, 438545, 613963, 3069815, 4297741, 21488705]

約数ペア:

[(1, 21488705), (5, 4297741), (7, 3069815), (35, 613963), (49, 438545), (139, 154595), (245, 87709), (631, 34055), (695, 30919), (973, 22085), (3155, 6811), (4417, 4865)]