20678140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1163}}^1$

素因数の和:1306

約数の個数: 48

約数和(自身を含む): 50061312

約数和(自身を除く): 29383172

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1163, 1270, 1778, 2326, 2540, 3556, 4445, 4652, 5815, 8141, 8890, 11630, 16282, 17780, 23260, 32564, 40705, 81410, 147701, 162820, 295402, 590804, 738505, 1033907, 1477010, 2067814, 2954020, 4135628, 5169535, 10339070, 20678140]

約数ペア:

[(1, 20678140), (2, 10339070), (4, 5169535), (5, 4135628), (7, 2954020), (10, 2067814), (14, 1477010), (20, 1033907), (28, 738505), (35, 590804), (70, 295402), (127, 162820), (140, 147701), (254, 81410), (508, 40705), (635, 32564), (889, 23260), (1163, 17780), (1270, 16282), (1778, 11630), (2326, 8890), (2540, 8141), (3556, 5815), (4445, 4652)]