81640180

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{163}}^1\times {\mathrm{317}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 175230720

約数和(自身を除く): 93590540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 163, 316, 317, 326, 395, 634, 652, 790, 815, 1268, 1580, 1585, 1630, 3170, 3260, 6340, 12877, 25043, 25754, 50086, 51508, 51671, 64385, 100172, 103342, 125215, 128770, 206684, 250430, 257540, 258355, 500860, 516710, 1033420, 4082009, 8164018, 16328036, 20410045, 40820090, 81640180]

約数ペア:

[(1, 81640180), (2, 40820090), (4, 20410045), (5, 16328036), (10, 8164018), (20, 4082009), (79, 1033420), (158, 516710), (163, 500860), (316, 258355), (317, 257540), (326, 250430), (395, 206684), (634, 128770), (652, 125215), (790, 103342), (815, 100172), (1268, 64385), (1580, 51671), (1585, 51508), (1630, 50086), (3170, 25754), (3260, 25043), (6340, 12877)]