21048416

素因数分解:

$2^5\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{263}}^1$

素因数の和:375

約数の個数: 48

約数和(自身を含む): 43309728

約数和(自身を除く): 22261312

約数列:

[1, 2, 4, 8, 16, 32, 41, 61, 82, 122, 164, 244, 263, 328, 488, 526, 656, 976, 1052, 1312, 1952, 2104, 2501, 4208, 5002, 8416, 10004, 10783, 16043, 20008, 21566, 32086, 40016, 43132, 64172, 80032, 86264, 128344, 172528, 256688, 345056, 513376, 657763, 1315526, 2631052, 5262104, 10524208, 21048416]

約数ペア:

[(1, 21048416), (2, 10524208), (4, 5262104), (8, 2631052), (16, 1315526), (32, 657763), (41, 513376), (61, 345056), (82, 256688), (122, 172528), (164, 128344), (244, 86264), (263, 80032), (328, 64172), (488, 43132), (526, 40016), (656, 32086), (976, 21566), (1052, 20008), (1312, 16043), (1952, 10783), (2104, 10004), (2501, 8416), (4208, 5002)]