21987103825

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{351653}}^1$

素因数の和:351765

約数の個数: 24

約数和(自身を含む): 28386917496

約数和(自身を除く): 6399813671

約数列:

[1, 5, 25, 41, 61, 205, 305, 1025, 1525, 2501, 12505, 62525, 351653, 1758265, 8791325, 14417773, 21450833, 72088865, 107254165, 360444325, 536270825, 879484153, 4397420765, 21987103825]

約数ペア:

[(1, 21987103825), (5, 4397420765), (25, 879484153), (41, 536270825), (61, 360444325), (205, 107254165), (305, 72088865), (1025, 21450833), (1525, 14417773), (2501, 8791325), (12505, 1758265), (62525, 351653)]