21738425

素因数分解:

$5^2\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{331}}^1$

素因数の和:449

約数の個数: 24

約数和(自身を含む): 28158912

約数和(自身を除く): 6420487

約数列:

[1, 5, 25, 37, 71, 185, 331, 355, 925, 1655, 1775, 2627, 8275, 12247, 13135, 23501, 61235, 65675, 117505, 306175, 587525, 869537, 4347685, 21738425]

約数ペア:

[(1, 21738425), (5, 4347685), (25, 869537), (37, 587525), (71, 306175), (185, 117505), (331, 65675), (355, 61235), (925, 23501), (1655, 13135), (1775, 12247), (2627, 8275)]