20008976

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:184

約数の個数: 80

約数和(自身を含む): 45205440

約数和(自身を除く): 25196464

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 61, 76, 83, 104, 122, 152, 166, 208, 244, 247, 304, 332, 488, 494, 664, 793, 976, 988, 1079, 1159, 1328, 1577, 1586, 1976, 2158, 2318, 3154, 3172, 3952, 4316, 4636, 5063, 6308, 6344, 8632, 9272, 10126, 12616, 12688, 15067, 17264, 18544, 20252, 20501, 25232, 30134, 40504, 41002, 60268, 65819, 81008, 82004, 96197, 120536, 131638, 164008, 192394, 241072, 263276, 328016, 384788, 526552, 769576, 1053104, 1250561, 1539152, 2501122, 5002244, 10004488, 20008976]

約数ペア:

[(1, 20008976), (2, 10004488), (4, 5002244), (8, 2501122), (13, 1539152), (16, 1250561), (19, 1053104), (26, 769576), (38, 526552), (52, 384788), (61, 328016), (76, 263276), (83, 241072), (104, 192394), (122, 164008), (152, 131638), (166, 120536), (208, 96197), (244, 82004), (247, 81008), (304, 65819), (332, 60268), (488, 41002), (494, 40504), (664, 30134), (793, 25232), (976, 20501), (988, 20252), (1079, 18544), (1159, 17264), (1328, 15067), (1577, 12688), (1586, 12616), (1976, 10126), (2158, 9272), (2318, 8632), (3154, 6344), (3172, 6308), (3952, 5063), (4316, 4636)]