19911365

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{2503}}^1$

素因数の和:2588

約数の個数: 16

約数和(自身を含む): 25120128

約数和(自身を除く): 5208763

約数列:

[1, 5, 37, 43, 185, 215, 1591, 2503, 7955, 12515, 92611, 107629, 463055, 538145, 3982273, 19911365]

約数ペア:

[(1, 19911365), (5, 3982273), (37, 538145), (43, 463055), (185, 107629), (215, 92611), (1591, 12515), (2503, 7955)]