81276680

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{229}}^1\times {\mathrm{467}}^1$

素因数の和:726

約数の個数: 64

約数和(自身を含む): 193752000

約数和(自身を除く): 112475320

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 229, 380, 458, 467, 760, 916, 934, 1145, 1832, 1868, 2290, 2335, 3736, 4351, 4580, 4670, 8702, 8873, 9160, 9340, 17404, 17746, 18680, 21755, 34808, 35492, 43510, 44365, 70984, 87020, 88730, 106943, 174040, 177460, 213886, 354920, 427772, 534715, 855544, 1069430, 2031917, 2138860, 4063834, 4277720, 8127668, 10159585, 16255336, 20319170, 40638340, 81276680]

約数ペア:

[(1, 81276680), (2, 40638340), (4, 20319170), (5, 16255336), (8, 10159585), (10, 8127668), (19, 4277720), (20, 4063834), (38, 2138860), (40, 2031917), (76, 1069430), (95, 855544), (152, 534715), (190, 427772), (229, 354920), (380, 213886), (458, 177460), (467, 174040), (760, 106943), (916, 88730), (934, 87020), (1145, 70984), (1832, 44365), (1868, 43510), (2290, 35492), (2335, 34808), (3736, 21755), (4351, 18680), (4580, 17746), (4670, 17404), (8702, 9340), (8873, 9160)]