20138140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{383}}^1$

素因数の和:642

約数の個数: 48

約数和(自身を含む): 46448640

約数和(自身を除く): 26310500

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 239, 383, 478, 766, 956, 1195, 1532, 1915, 2390, 2629, 3830, 4213, 4780, 5258, 7660, 8426, 10516, 13145, 16852, 21065, 26290, 42130, 52580, 84260, 91537, 183074, 366148, 457685, 915370, 1006907, 1830740, 2013814, 4027628, 5034535, 10069070, 20138140]

約数ペア:

[(1, 20138140), (2, 10069070), (4, 5034535), (5, 4027628), (10, 2013814), (11, 1830740), (20, 1006907), (22, 915370), (44, 457685), (55, 366148), (110, 183074), (220, 91537), (239, 84260), (383, 52580), (478, 42130), (766, 26290), (956, 21065), (1195, 16852), (1532, 13145), (1915, 10516), (2390, 8426), (2629, 7660), (3830, 5258), (4213, 4780)]