21558128

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{557}}^1$

素因数の和:665

約数の個数: 40

約数和(自身を含む): 43590960

約数和(自身を除く): 22032832

約数列:

[1, 2, 4, 8, 16, 41, 59, 82, 118, 164, 236, 328, 472, 557, 656, 944, 1114, 2228, 2419, 4456, 4838, 8912, 9676, 19352, 22837, 32863, 38704, 45674, 65726, 91348, 131452, 182696, 262904, 365392, 525808, 1347383, 2694766, 5389532, 10779064, 21558128]

約数ペア:

[(1, 21558128), (2, 10779064), (4, 5389532), (8, 2694766), (16, 1347383), (41, 525808), (59, 365392), (82, 262904), (118, 182696), (164, 131452), (236, 91348), (328, 65726), (472, 45674), (557, 38704), (656, 32863), (944, 22837), (1114, 19352), (2228, 9676), (2419, 8912), (4456, 4838)]