20289640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{233}}^1\times {\mathrm{311}}^1$

素因数の和:562

約数の個数: 64

約数和(自身を含む): 52565760

約数和(自身を除く): 32276120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 233, 280, 311, 466, 622, 932, 1165, 1244, 1555, 1631, 1864, 2177, 2330, 2488, 3110, 3262, 4354, 4660, 6220, 6524, 8155, 8708, 9320, 10885, 12440, 13048, 16310, 17416, 21770, 32620, 43540, 65240, 72463, 87080, 144926, 289852, 362315, 507241, 579704, 724630, 1014482, 1449260, 2028964, 2536205, 2898520, 4057928, 5072410, 10144820, 20289640]

約数ペア:

[(1, 20289640), (2, 10144820), (4, 5072410), (5, 4057928), (7, 2898520), (8, 2536205), (10, 2028964), (14, 1449260), (20, 1014482), (28, 724630), (35, 579704), (40, 507241), (56, 362315), (70, 289852), (140, 144926), (233, 87080), (280, 72463), (311, 65240), (466, 43540), (622, 32620), (932, 21770), (1165, 17416), (1244, 16310), (1555, 13048), (1631, 12440), (1864, 10885), (2177, 9320), (2330, 8708), (2488, 8155), (3110, 6524), (3262, 6220), (4354, 4660)]