20128781718

素因数分解:

$2^1\times 3^4\times {\mathrm{137}}^1\times {\mathrm{379}}^1\times {\mathrm{2393}}^1$

素因数の和:2923

約数の個数: 80

約数和(自身を含む): 45571513680

約数和(自身を除く): 25442731962

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 81, 137, 162, 274, 379, 411, 758, 822, 1137, 1233, 2274, 2393, 2466, 3411, 3699, 4786, 6822, 7179, 7398, 10233, 11097, 14358, 20466, 21537, 22194, 30699, 43074, 51923, 61398, 64611, 103846, 129222, 155769, 193833, 311538, 327841, 387666, 467307, 655682, 906947, 934614, 983523, 1401921, 1813894, 1967046, 2720841, 2803842, 2950569, 4205763, 5441682, 5901138, 8162523, 8411526, 8851707, 16325046, 17703414, 24487569, 26555121, 48975138, 53110242, 73462707, 124251739, 146925414, 248503478, 372755217, 745510434, 1118265651, 2236531302, 3354796953, 6709593906, 10064390859, 20128781718]

約数ペア:

[(1, 20128781718), (2, 10064390859), (3, 6709593906), (6, 3354796953), (9, 2236531302), (18, 1118265651), (27, 745510434), (54, 372755217), (81, 248503478), (137, 146925414), (162, 124251739), (274, 73462707), (379, 53110242), (411, 48975138), (758, 26555121), (822, 24487569), (1137, 17703414), (1233, 16325046), (2274, 8851707), (2393, 8411526), (2466, 8162523), (3411, 5901138), (3699, 5441682), (4786, 4205763), (6822, 2950569), (7179, 2803842), (7398, 2720841), (10233, 1967046), (11097, 1813894), (14358, 1401921), (20466, 983523), (21537, 934614), (22194, 906947), (30699, 655682), (43074, 467307), (51923, 387666), (61398, 327841), (64611, 311538), (103846, 193833), (129222, 155769)]