20001891

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1787}}^1$

素因数の和:1851

約数の個数: 32

約数和(自身を含む): 33643008

約数和(自身を除く): 13641117

約数列:

[1, 3, 7, 13, 21, 39, 41, 91, 123, 273, 287, 533, 861, 1599, 1787, 3731, 5361, 11193, 12509, 23231, 37527, 69693, 73267, 162617, 219801, 487851, 512869, 952471, 1538607, 2857413, 6667297, 20001891]

約数ペア:

[(1, 20001891), (3, 6667297), (7, 2857413), (13, 1538607), (21, 952471), (39, 512869), (41, 487851), (91, 219801), (123, 162617), (273, 73267), (287, 69693), (533, 37527), (861, 23231), (1599, 12509), (1787, 11193), (3731, 5361)]