20445705

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1381}}^1$

素因数の和:1446

約数の個数: 48

約数和(自身を含む): 41393664

約数和(自身を除く): 20947959

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 47, 63, 105, 141, 235, 315, 329, 423, 705, 987, 1381, 1645, 2115, 2961, 4143, 4935, 6905, 9667, 12429, 14805, 20715, 29001, 48335, 62145, 64907, 87003, 145005, 194721, 324535, 435015, 454349, 584163, 973605, 1363047, 2271745, 2920815, 4089141, 6815235, 20445705]

約数ペア:

[(1, 20445705), (3, 6815235), (5, 4089141), (7, 2920815), (9, 2271745), (15, 1363047), (21, 973605), (35, 584163), (45, 454349), (47, 435015), (63, 324535), (105, 194721), (141, 145005), (235, 87003), (315, 64907), (329, 62145), (423, 48335), (705, 29001), (987, 20715), (1381, 14805), (1645, 12429), (2115, 9667), (2961, 6905), (4143, 4935)]