21529120

素因数分解:

$2^5\times 5^1\times {\mathrm{239}}^1\times {\mathrm{563}}^1$

素因数の和:817

約数の個数: 48

約数和(自身を含む): 51166080

約数和(自身を除く): 29636960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 239, 478, 563, 956, 1126, 1195, 1912, 2252, 2390, 2815, 3824, 4504, 4780, 5630, 7648, 9008, 9560, 11260, 18016, 19120, 22520, 38240, 45040, 90080, 134557, 269114, 538228, 672785, 1076456, 1345570, 2152912, 2691140, 4305824, 5382280, 10764560, 21529120]

約数ペア:

[(1, 21529120), (2, 10764560), (4, 5382280), (5, 4305824), (8, 2691140), (10, 2152912), (16, 1345570), (20, 1076456), (32, 672785), (40, 538228), (80, 269114), (160, 134557), (239, 90080), (478, 45040), (563, 38240), (956, 22520), (1126, 19120), (1195, 18016), (1912, 11260), (2252, 9560), (2390, 9008), (2815, 7648), (3824, 5630), (4504, 4780)]