20818910

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1$

素因数の和:297

約数の個数: 64

約数和(自身を含む): 45591552

約数和(自身を除く): 24772642

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 67, 70, 115, 134, 161, 193, 230, 322, 335, 386, 469, 670, 805, 938, 965, 1351, 1541, 1610, 1930, 2345, 2702, 3082, 4439, 4690, 6755, 7705, 8878, 10787, 12931, 13510, 15410, 21574, 22195, 25862, 31073, 44390, 53935, 62146, 64655, 90517, 107870, 129310, 155365, 181034, 297413, 310730, 452585, 594826, 905170, 1487065, 2081891, 2974130, 4163782, 10409455, 20818910]

約数ペア:

[(1, 20818910), (2, 10409455), (5, 4163782), (7, 2974130), (10, 2081891), (14, 1487065), (23, 905170), (35, 594826), (46, 452585), (67, 310730), (70, 297413), (115, 181034), (134, 155365), (161, 129310), (193, 107870), (230, 90517), (322, 64655), (335, 62146), (386, 53935), (469, 44390), (670, 31073), (805, 25862), (938, 22195), (965, 21574), (1351, 15410), (1541, 13510), (1610, 12931), (1930, 10787), (2345, 8878), (2702, 7705), (3082, 6755), (4439, 4690)]