20520885

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{163}}^1$

素因数の和:298

約数の個数: 64

約数和(自身を含む): 41564160

約数和(自身を除く): 21043275

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 109, 163, 165, 231, 327, 385, 489, 545, 763, 815, 1141, 1155, 1199, 1635, 1793, 2289, 2445, 3423, 3597, 3815, 5379, 5705, 5995, 8393, 8965, 11445, 12551, 17115, 17767, 17985, 25179, 26895, 37653, 41965, 53301, 62755, 88835, 124369, 125895, 188265, 195437, 266505, 373107, 586311, 621845, 977185, 1368059, 1865535, 2931555, 4104177, 6840295, 20520885]

約数ペア:

[(1, 20520885), (3, 6840295), (5, 4104177), (7, 2931555), (11, 1865535), (15, 1368059), (21, 977185), (33, 621845), (35, 586311), (55, 373107), (77, 266505), (105, 195437), (109, 188265), (163, 125895), (165, 124369), (231, 88835), (327, 62755), (385, 53301), (489, 41965), (545, 37653), (763, 26895), (815, 25179), (1141, 17985), (1155, 17767), (1199, 17115), (1635, 12551), (1793, 11445), (2289, 8965), (2445, 8393), (3423, 5995), (3597, 5705), (3815, 5379)]