20457515

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{491}}^1\times {\mathrm{641}}^1$

素因数の和:1150

約数の個数: 16

約数和(自身を含む): 26532576

約数和(自身を除く): 6075061

約数列:

[1, 5, 13, 65, 491, 641, 2455, 3205, 6383, 8333, 31915, 41665, 314731, 1573655, 4091503, 20457515]

約数ペア:

[(1, 20457515), (5, 4091503), (13, 1573655), (65, 314731), (491, 41665), (641, 31915), (2455, 8333), (3205, 6383)]