20980908

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{353}}^1$

素因数の和:503

約数の個数: 72

約数和(自身を含む): 57727488

約数和(自身を除く): 36746580

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 127, 156, 234, 254, 353, 381, 468, 508, 706, 762, 1059, 1143, 1412, 1524, 1651, 2118, 2286, 3177, 3302, 4236, 4572, 4589, 4953, 6354, 6604, 9178, 9906, 12708, 13767, 14859, 18356, 19812, 27534, 29718, 41301, 44831, 55068, 59436, 82602, 89662, 134493, 165204, 179324, 268986, 403479, 537972, 582803, 806958, 1165606, 1613916, 1748409, 2331212, 3496818, 5245227, 6993636, 10490454, 20980908]

約数ペア:

[(1, 20980908), (2, 10490454), (3, 6993636), (4, 5245227), (6, 3496818), (9, 2331212), (12, 1748409), (13, 1613916), (18, 1165606), (26, 806958), (36, 582803), (39, 537972), (52, 403479), (78, 268986), (117, 179324), (127, 165204), (156, 134493), (234, 89662), (254, 82602), (353, 59436), (381, 55068), (468, 44831), (508, 41301), (706, 29718), (762, 27534), (1059, 19812), (1143, 18356), (1412, 14859), (1524, 13767), (1651, 12708), (2118, 9906), (2286, 9178), (3177, 6604), (3302, 6354), (4236, 4953), (4572, 4589)]