20972644

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{457}}^1$

素因数の和:628

約数の個数: 48

約数和(自身を含む): 46166400

約数和(自身を除く): 25193756

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 149, 154, 298, 308, 457, 596, 914, 1043, 1639, 1828, 2086, 3199, 3278, 4172, 5027, 6398, 6556, 10054, 11473, 12796, 20108, 22946, 35189, 45892, 68093, 70378, 136186, 140756, 272372, 476651, 749023, 953302, 1498046, 1906604, 2996092, 5243161, 10486322, 20972644]

約数ペア:

[(1, 20972644), (2, 10486322), (4, 5243161), (7, 2996092), (11, 1906604), (14, 1498046), (22, 953302), (28, 749023), (44, 476651), (77, 272372), (149, 140756), (154, 136186), (298, 70378), (308, 68093), (457, 45892), (596, 35189), (914, 22946), (1043, 20108), (1639, 12796), (1828, 11473), (2086, 10054), (3199, 6556), (3278, 6398), (4172, 5027)]