20639073

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1$

素因数の和:238

約数の個数: 64

約数和(自身を含む): 37416960

約数和(自身を除く): 16777887

約数列:

[1, 3, 7, 13, 19, 21, 23, 39, 57, 69, 91, 133, 161, 173, 247, 273, 299, 399, 437, 483, 519, 741, 897, 1211, 1311, 1729, 2093, 2249, 3059, 3287, 3633, 3979, 5187, 5681, 6279, 6747, 9177, 9861, 11937, 15743, 17043, 23009, 27853, 39767, 42731, 47229, 51727, 69027, 75601, 83559, 119301, 128193, 155181, 226803, 299117, 362089, 529207, 897351, 982813, 1086267, 1587621, 2948439, 6879691, 20639073]

約数ペア:

[(1, 20639073), (3, 6879691), (7, 2948439), (13, 1587621), (19, 1086267), (21, 982813), (23, 897351), (39, 529207), (57, 362089), (69, 299117), (91, 226803), (133, 155181), (161, 128193), (173, 119301), (247, 83559), (273, 75601), (299, 69027), (399, 51727), (437, 47229), (483, 42731), (519, 39767), (741, 27853), (897, 23009), (1211, 17043), (1311, 15743), (1729, 11937), (2093, 9861), (2249, 9177), (3059, 6747), (3287, 6279), (3633, 5681), (3979, 5187)]