20672080

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{139}}^1$

素因数の和:189

約数の個数: 120

約数和(自身を含む): 57183840

約数和(自身を除く): 36511760

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 40, 44, 52, 55, 65, 80, 88, 104, 110, 130, 139, 143, 169, 176, 208, 220, 260, 278, 286, 338, 440, 520, 556, 572, 676, 695, 715, 845, 880, 1040, 1112, 1144, 1352, 1390, 1430, 1529, 1690, 1807, 1859, 2224, 2288, 2704, 2780, 2860, 3058, 3380, 3614, 3718, 5560, 5720, 6116, 6760, 7228, 7436, 7645, 9035, 9295, 11120, 11440, 12232, 13520, 14456, 14872, 15290, 18070, 18590, 19877, 23491, 24464, 28912, 29744, 30580, 36140, 37180, 39754, 46982, 61160, 72280, 74360, 79508, 93964, 99385, 117455, 122320, 144560, 148720, 159016, 187928, 198770, 234910, 258401, 318032, 375856, 397540, 469820, 516802, 795080, 939640, 1033604, 1292005, 1590160, 1879280, 2067208, 2584010, 4134416, 5168020, 10336040, 20672080]

約数ペア:

[(1, 20672080), (2, 10336040), (4, 5168020), (5, 4134416), (8, 2584010), (10, 2067208), (11, 1879280), (13, 1590160), (16, 1292005), (20, 1033604), (22, 939640), (26, 795080), (40, 516802), (44, 469820), (52, 397540), (55, 375856), (65, 318032), (80, 258401), (88, 234910), (104, 198770), (110, 187928), (130, 159016), (139, 148720), (143, 144560), (169, 122320), (176, 117455), (208, 99385), (220, 93964), (260, 79508), (278, 74360), (286, 72280), (338, 61160), (440, 46982), (520, 39754), (556, 37180), (572, 36140), (676, 30580), (695, 29744), (715, 28912), (845, 24464), (880, 23491), (1040, 19877), (1112, 18590), (1144, 18070), (1352, 15290), (1390, 14872), (1430, 14456), (1529, 13520), (1690, 12232), (1807, 11440), (1859, 11120), (2224, 9295), (2288, 9035), (2704, 7645), (2780, 7436), (2860, 7228), (3058, 6760), (3380, 6116), (3614, 5720), (3718, 5560)]