20565008

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:543

約数の個数: 40

約数和(自身を含む): 41443776

約数和(自身を除く): 20878768

約数列:

[1, 2, 4, 8, 16, 43, 71, 86, 142, 172, 284, 344, 421, 568, 688, 842, 1136, 1684, 3053, 3368, 6106, 6736, 12212, 18103, 24424, 29891, 36206, 48848, 59782, 72412, 119564, 144824, 239128, 289648, 478256, 1285313, 2570626, 5141252, 10282504, 20565008]

約数ペア:

[(1, 20565008), (2, 10282504), (4, 5141252), (8, 2570626), (16, 1285313), (43, 478256), (71, 289648), (86, 239128), (142, 144824), (172, 119564), (284, 72412), (344, 59782), (421, 48848), (568, 36206), (688, 29891), (842, 24424), (1136, 18103), (1684, 12212), (3053, 6736), (3368, 6106)]