21857619

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1889}}^1$

素因数の和:1947

約数の個数: 32

約数和(自身を含む): 36288000

約数和(自身を除く): 14430381

約数列:

[1, 3, 7, 19, 21, 29, 57, 87, 133, 203, 399, 551, 609, 1653, 1889, 3857, 5667, 11571, 13223, 35891, 39669, 54781, 107673, 164343, 251237, 383467, 753711, 1040839, 1150401, 3122517, 7285873, 21857619]

約数ペア:

[(1, 21857619), (3, 7285873), (7, 3122517), (19, 1150401), (21, 1040839), (29, 753711), (57, 383467), (87, 251237), (133, 164343), (203, 107673), (399, 54781), (551, 39669), (609, 35891), (1653, 13223), (1889, 11571), (3857, 5667)]