20660780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{8681}}^1$

素因数の和:8714

約数の個数: 48

約数和(自身を含む): 52508736

約数和(自身を除く): 31847956

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 340, 476, 595, 1190, 2380, 8681, 17362, 34724, 43405, 60767, 86810, 121534, 147577, 173620, 243068, 295154, 303835, 590308, 607670, 737885, 1033039, 1215340, 1475770, 2066078, 2951540, 4132156, 5165195, 10330390, 20660780]

約数ペア:

[(1, 20660780), (2, 10330390), (4, 5165195), (5, 4132156), (7, 2951540), (10, 2066078), (14, 1475770), (17, 1215340), (20, 1033039), (28, 737885), (34, 607670), (35, 590308), (68, 303835), (70, 295154), (85, 243068), (119, 173620), (140, 147577), (170, 121534), (238, 86810), (340, 60767), (476, 43405), (595, 34724), (1190, 17362), (2380, 8681)]