20986735

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{151}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 33357312

約数和(自身を除く): 12370577

約数列:

[1, 5, 7, 11, 19, 35, 55, 77, 95, 133, 151, 209, 361, 385, 665, 755, 1045, 1057, 1463, 1661, 1805, 2527, 2869, 3971, 5285, 7315, 8305, 11627, 12635, 14345, 19855, 20083, 27797, 31559, 54511, 58135, 100415, 138985, 157795, 220913, 272555, 381577, 599621, 1104565, 1907885, 2998105, 4197347, 20986735]

約数ペア:

[(1, 20986735), (5, 4197347), (7, 2998105), (11, 1907885), (19, 1104565), (35, 599621), (55, 381577), (77, 272555), (95, 220913), (133, 157795), (151, 138985), (209, 100415), (361, 58135), (385, 54511), (665, 31559), (755, 27797), (1045, 20083), (1057, 19855), (1463, 14345), (1661, 12635), (1805, 11627), (2527, 8305), (2869, 7315), (3971, 5285)]