20697740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{907}}^1$

素因数の和:1086

約数の個数: 48

約数和(自身を含む): 50034432

約数和(自身を除く): 29336692

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 163, 326, 652, 815, 907, 1141, 1630, 1814, 2282, 3260, 3628, 4535, 4564, 5705, 6349, 9070, 11410, 12698, 18140, 22820, 25396, 31745, 63490, 126980, 147841, 295682, 591364, 739205, 1034887, 1478410, 2069774, 2956820, 4139548, 5174435, 10348870, 20697740]

約数ペア:

[(1, 20697740), (2, 10348870), (4, 5174435), (5, 4139548), (7, 2956820), (10, 2069774), (14, 1478410), (20, 1034887), (28, 739205), (35, 591364), (70, 295682), (140, 147841), (163, 126980), (326, 63490), (652, 31745), (815, 25396), (907, 22820), (1141, 18140), (1630, 12698), (1814, 11410), (2282, 9070), (3260, 6349), (3628, 5705), (4535, 4564)]