20187755

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 30878496

約数和(自身を除く): 10690741

約数列:

[1, 5, 7, 17, 35, 37, 49, 85, 119, 131, 185, 245, 259, 595, 629, 655, 833, 917, 1295, 1813, 2227, 3145, 4165, 4403, 4585, 4847, 6419, 9065, 11135, 15589, 22015, 24235, 30821, 32095, 33929, 77945, 82399, 109123, 154105, 169645, 237503, 411995, 545615, 576793, 1187515, 2883965, 4037551, 20187755]

約数ペア:

[(1, 20187755), (5, 4037551), (7, 2883965), (17, 1187515), (35, 576793), (37, 545615), (49, 411995), (85, 237503), (119, 169645), (131, 154105), (185, 109123), (245, 82399), (259, 77945), (595, 33929), (629, 32095), (655, 30821), (833, 24235), (917, 22015), (1295, 15589), (1813, 11135), (2227, 9065), (3145, 6419), (4165, 4847), (4403, 4585)]