20739640

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{941}}^1$

素因数の和:1000

約数の個数: 64

約数和(自身を含む): 50868000

約数和(自身を除く): 30128360

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 29, 38, 40, 58, 76, 95, 116, 145, 152, 190, 232, 290, 380, 551, 580, 760, 941, 1102, 1160, 1882, 2204, 2755, 3764, 4408, 4705, 5510, 7528, 9410, 11020, 17879, 18820, 22040, 27289, 35758, 37640, 54578, 71516, 89395, 109156, 136445, 143032, 178790, 218312, 272890, 357580, 518491, 545780, 715160, 1036982, 1091560, 2073964, 2592455, 4147928, 5184910, 10369820, 20739640]

約数ペア:

[(1, 20739640), (2, 10369820), (4, 5184910), (5, 4147928), (8, 2592455), (10, 2073964), (19, 1091560), (20, 1036982), (29, 715160), (38, 545780), (40, 518491), (58, 357580), (76, 272890), (95, 218312), (116, 178790), (145, 143032), (152, 136445), (190, 109156), (232, 89395), (290, 71516), (380, 54578), (551, 37640), (580, 35758), (760, 27289), (941, 22040), (1102, 18820), (1160, 17879), (1882, 11020), (2204, 9410), (2755, 7528), (3764, 5510), (4408, 4705)]