20131280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1489}}^1$

素因数の和:1528

約数の個数: 60

約数和(自身を含む): 50716620

約数和(自身を除く): 30585340

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 520, 676, 845, 1040, 1352, 1489, 1690, 2704, 2978, 3380, 5956, 6760, 7445, 11912, 13520, 14890, 19357, 23824, 29780, 38714, 59560, 77428, 96785, 119120, 154856, 193570, 251641, 309712, 387140, 503282, 774280, 1006564, 1258205, 1548560, 2013128, 2516410, 4026256, 5032820, 10065640, 20131280]

約数ペア:

[(1, 20131280), (2, 10065640), (4, 5032820), (5, 4026256), (8, 2516410), (10, 2013128), (13, 1548560), (16, 1258205), (20, 1006564), (26, 774280), (40, 503282), (52, 387140), (65, 309712), (80, 251641), (104, 193570), (130, 154856), (169, 119120), (208, 96785), (260, 77428), (338, 59560), (520, 38714), (676, 29780), (845, 23824), (1040, 19357), (1352, 14890), (1489, 13520), (1690, 11912), (2704, 7445), (2978, 6760), (3380, 5956)]