221291291

素因数分解:

${\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{193}}^1\times {\mathrm{991}}^1$

素因数の和:1286

約数の個数: 16

約数和(自身を含む): 242484480

約数和(自身を除く): 21193189

約数列:

[1, 13, 89, 193, 991, 1157, 2509, 12883, 17177, 88199, 191263, 223301, 1146587, 2486419, 17022407, 221291291]

約数ペア:

[(1, 221291291), (13, 17022407), (89, 2486419), (193, 1146587), (991, 223301), (1157, 191263), (2509, 88199), (12883, 17177)]