20137975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 30248064

約数和(自身を除く): 10110089

約数列:

[1, 5, 11, 13, 25, 43, 55, 65, 131, 143, 215, 275, 325, 473, 559, 655, 715, 1075, 1441, 1703, 2365, 2795, 3275, 3575, 5633, 6149, 7205, 8515, 11825, 13975, 18733, 28165, 30745, 36025, 42575, 61963, 73229, 93665, 140825, 153725, 309815, 366145, 468325, 805519, 1549075, 1830725, 4027595, 20137975]

約数ペア:

[(1, 20137975), (5, 4027595), (11, 1830725), (13, 1549075), (25, 805519), (43, 468325), (55, 366145), (65, 309815), (131, 153725), (143, 140825), (215, 93665), (275, 73229), (325, 61963), (473, 42575), (559, 36025), (655, 30745), (715, 28165), (1075, 18733), (1441, 13975), (1703, 11825), (2365, 8515), (2795, 7205), (3275, 6149), (3575, 5633)]