31051280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{409}}^1$

素因数の和:508

約数の個数: 80

約数和(自身を含む): 79005360

約数和(自身を除く): 47954080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 73, 80, 104, 130, 146, 208, 260, 292, 365, 409, 520, 584, 730, 818, 949, 1040, 1168, 1460, 1636, 1898, 2045, 2920, 3272, 3796, 4090, 4745, 5317, 5840, 6544, 7592, 8180, 9490, 10634, 15184, 16360, 18980, 21268, 26585, 29857, 32720, 37960, 42536, 53170, 59714, 75920, 85072, 106340, 119428, 149285, 212680, 238856, 298570, 388141, 425360, 477712, 597140, 776282, 1194280, 1552564, 1940705, 2388560, 3105128, 3881410, 6210256, 7762820, 15525640, 31051280]

約数ペア:

[(1, 31051280), (2, 15525640), (4, 7762820), (5, 6210256), (8, 3881410), (10, 3105128), (13, 2388560), (16, 1940705), (20, 1552564), (26, 1194280), (40, 776282), (52, 597140), (65, 477712), (73, 425360), (80, 388141), (104, 298570), (130, 238856), (146, 212680), (208, 149285), (260, 119428), (292, 106340), (365, 85072), (409, 75920), (520, 59714), (584, 53170), (730, 42536), (818, 37960), (949, 32720), (1040, 29857), (1168, 26585), (1460, 21268), (1636, 18980), (1898, 16360), (2045, 15184), (2920, 10634), (3272, 9490), (3796, 8180), (4090, 7592), (4745, 6544), (5317, 5840)]