21123810

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{2971}}^1$

素因数の和:3063

約数の個数: 48

約数和(自身を含む): 55635840

約数和(自身を除く): 34512030

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 79, 90, 158, 237, 395, 474, 711, 790, 1185, 1422, 2370, 2971, 3555, 5942, 7110, 8913, 14855, 17826, 26739, 29710, 44565, 53478, 89130, 133695, 234709, 267390, 469418, 704127, 1173545, 1408254, 2112381, 2347090, 3520635, 4224762, 7041270, 10561905, 21123810]

約数ペア:

[(1, 21123810), (2, 10561905), (3, 7041270), (5, 4224762), (6, 3520635), (9, 2347090), (10, 2112381), (15, 1408254), (18, 1173545), (30, 704127), (45, 469418), (79, 267390), (90, 234709), (158, 133695), (237, 89130), (395, 53478), (474, 44565), (711, 29710), (790, 26739), (1185, 17826), (1422, 14855), (2370, 8913), (2971, 7110), (3555, 5942)]