21968950

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1$

素因数の和:289

約数の個数: 48

約数和(自身を含む): 42966000

約数和(自身を除く): 20997050

約数列:

[1, 2, 5, 10, 25, 29, 50, 58, 109, 139, 145, 218, 278, 290, 545, 695, 725, 1090, 1390, 1450, 2725, 3161, 3475, 4031, 5450, 6322, 6950, 8062, 15151, 15805, 20155, 30302, 31610, 40310, 75755, 79025, 100775, 151510, 158050, 201550, 378775, 439379, 757550, 878758, 2196895, 4393790, 10984475, 21968950]

約数ペア:

[(1, 21968950), (2, 10984475), (5, 4393790), (10, 2196895), (25, 878758), (29, 757550), (50, 439379), (58, 378775), (109, 201550), (139, 158050), (145, 151510), (218, 100775), (278, 79025), (290, 75755), (545, 40310), (695, 31610), (725, 30302), (1090, 20155), (1390, 15805), (1450, 15151), (2725, 8062), (3161, 6950), (3475, 6322), (4031, 5450)]