20604680

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{193}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 49656240

約数和(自身を除く): 29051560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 157, 170, 193, 314, 340, 386, 628, 680, 772, 785, 965, 1256, 1544, 1570, 1930, 2669, 3140, 3281, 3860, 5338, 6280, 6562, 7720, 10676, 13124, 13345, 16405, 21352, 26248, 26690, 30301, 32810, 53380, 60602, 65620, 106760, 121204, 131240, 151505, 242408, 303010, 515117, 606020, 1030234, 1212040, 2060468, 2575585, 4120936, 5151170, 10302340, 20604680]

約数ペア:

[(1, 20604680), (2, 10302340), (4, 5151170), (5, 4120936), (8, 2575585), (10, 2060468), (17, 1212040), (20, 1030234), (34, 606020), (40, 515117), (68, 303010), (85, 242408), (136, 151505), (157, 131240), (170, 121204), (193, 106760), (314, 65620), (340, 60602), (386, 53380), (628, 32810), (680, 30301), (772, 26690), (785, 26248), (965, 21352), (1256, 16405), (1544, 13345), (1570, 13124), (1930, 10676), (2669, 7720), (3140, 6562), (3281, 6280), (3860, 5338)]