20478975

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{241}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 37449984

約数和(自身を除く): 16971009

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 103, 165, 241, 275, 309, 515, 723, 825, 1133, 1205, 1545, 2575, 2651, 3399, 3615, 5665, 6025, 7725, 7953, 13255, 16995, 18075, 24823, 28325, 39765, 66275, 74469, 84975, 124115, 198825, 273053, 372345, 620575, 819159, 1365265, 1861725, 4095795, 6826325, 20478975]

約数ペア:

[(1, 20478975), (3, 6826325), (5, 4095795), (11, 1861725), (15, 1365265), (25, 819159), (33, 620575), (55, 372345), (75, 273053), (103, 198825), (165, 124115), (241, 84975), (275, 74469), (309, 66275), (515, 39765), (723, 28325), (825, 24823), (1133, 18075), (1205, 16995), (1545, 13255), (2575, 7953), (2651, 7725), (3399, 6025), (3615, 5665)]