20880080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1181}}^1$

素因数の和:1224

約数の個数: 80

約数和(自身を含む): 55402704

約数和(自身を除く): 34522624

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 34, 40, 52, 65, 68, 80, 85, 104, 130, 136, 170, 208, 221, 260, 272, 340, 442, 520, 680, 884, 1040, 1105, 1181, 1360, 1768, 2210, 2362, 3536, 4420, 4724, 5905, 8840, 9448, 11810, 15353, 17680, 18896, 20077, 23620, 30706, 40154, 47240, 61412, 76765, 80308, 94480, 100385, 122824, 153530, 160616, 200770, 245648, 261001, 307060, 321232, 401540, 522002, 614120, 803080, 1044004, 1228240, 1305005, 1606160, 2088008, 2610010, 4176016, 5220020, 10440040, 20880080]

約数ペア:

[(1, 20880080), (2, 10440040), (4, 5220020), (5, 4176016), (8, 2610010), (10, 2088008), (13, 1606160), (16, 1305005), (17, 1228240), (20, 1044004), (26, 803080), (34, 614120), (40, 522002), (52, 401540), (65, 321232), (68, 307060), (80, 261001), (85, 245648), (104, 200770), (130, 160616), (136, 153530), (170, 122824), (208, 100385), (221, 94480), (260, 80308), (272, 76765), (340, 61412), (442, 47240), (520, 40154), (680, 30706), (884, 23620), (1040, 20077), (1105, 18896), (1181, 17680), (1360, 15353), (1768, 11810), (2210, 9448), (2362, 8840), (3536, 5905), (4420, 4724)]