81784885

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{1039}}^1$

素因数の和:1237

約数の個数: 32

約数和(自身を含む): 121605120

約数和(自身を除く): 39820235

約数列:

[1, 5, 7, 13, 35, 65, 91, 173, 455, 865, 1039, 1211, 2249, 5195, 6055, 7273, 11245, 13507, 15743, 36365, 67535, 78715, 94549, 179747, 472745, 898735, 1258229, 2336711, 6291145, 11683555, 16356977, 81784885]

約数ペア:

[(1, 81784885), (5, 16356977), (7, 11683555), (13, 6291145), (35, 2336711), (65, 1258229), (91, 898735), (173, 472745), (455, 179747), (865, 94549), (1039, 78715), (1211, 67535), (2249, 36365), (5195, 15743), (6055, 13507), (7273, 11245)]