20490778

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1$

素因数の和:235

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 20981222

約数列:

[1, 2, 7, 11, 14, 19, 22, 38, 47, 77, 94, 133, 149, 154, 209, 266, 298, 329, 418, 517, 658, 893, 1034, 1043, 1463, 1639, 1786, 2086, 2831, 2926, 3278, 3619, 5662, 6251, 7003, 7238, 9823, 11473, 12502, 14006, 19646, 19817, 22946, 31141, 39634, 49021, 62282, 68761, 77033, 98042, 133057, 137522, 154066, 217987, 266114, 435974, 539231, 931399, 1078462, 1463627, 1862798, 2927254, 10245389, 20490778]

約数ペア:

[(1, 20490778), (2, 10245389), (7, 2927254), (11, 1862798), (14, 1463627), (19, 1078462), (22, 931399), (38, 539231), (47, 435974), (77, 266114), (94, 217987), (133, 154066), (149, 137522), (154, 133057), (209, 98042), (266, 77033), (298, 68761), (329, 62282), (418, 49021), (517, 39634), (658, 31141), (893, 22946), (1034, 19817), (1043, 19646), (1463, 14006), (1639, 12502), (1786, 11473), (2086, 9823), (2831, 7238), (2926, 7003), (3278, 6251), (3619, 5662)]