28571140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:221

約数の個数: 72

約数和(自身を含む): 66407040

約数和(自身を除く): 37835900

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 107, 130, 158, 169, 214, 260, 316, 338, 395, 428, 535, 676, 790, 845, 1027, 1070, 1391, 1580, 1690, 2054, 2140, 2782, 3380, 4108, 5135, 5564, 6955, 8453, 10270, 13351, 13910, 16906, 18083, 20540, 26702, 27820, 33812, 36166, 42265, 53404, 66755, 72332, 84530, 90415, 109889, 133510, 169060, 180830, 219778, 267020, 361660, 439556, 549445, 1098890, 1428557, 2197780, 2857114, 5714228, 7142785, 14285570, 28571140]

約数ペア:

[(1, 28571140), (2, 14285570), (4, 7142785), (5, 5714228), (10, 2857114), (13, 2197780), (20, 1428557), (26, 1098890), (52, 549445), (65, 439556), (79, 361660), (107, 267020), (130, 219778), (158, 180830), (169, 169060), (214, 133510), (260, 109889), (316, 90415), (338, 84530), (395, 72332), (428, 66755), (535, 53404), (676, 42265), (790, 36166), (845, 33812), (1027, 27820), (1070, 26702), (1391, 20540), (1580, 18083), (1690, 16906), (2054, 13910), (2140, 13351), (2782, 10270), (3380, 8453), (4108, 6955), (5135, 5564)]