81726320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78583}}^1$

素因数の和:78609

約数の個数: 40

約数和(自身を含む): 204632736

約数和(自身を除く): 122906416

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78583, 157166, 314332, 392915, 628664, 785830, 1021579, 1257328, 1571660, 2043158, 3143320, 4086316, 5107895, 6286640, 8172632, 10215790, 16345264, 20431580, 40863160, 81726320]

約数ペア:

[(1, 81726320), (2, 40863160), (4, 20431580), (5, 16345264), (8, 10215790), (10, 8172632), (13, 6286640), (16, 5107895), (20, 4086316), (26, 3143320), (40, 2043158), (52, 1571660), (65, 1257328), (80, 1021579), (104, 785830), (130, 628664), (208, 392915), (260, 314332), (520, 157166), (1040, 78583)]