21409276

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{5749}}^1$

素因数の和:5786

約数の個数: 36

約数和(自身を含む): 45885000

約数和(自身を除く): 24475724

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 49, 76, 98, 133, 196, 266, 532, 931, 1862, 3724, 5749, 11498, 22996, 40243, 80486, 109231, 160972, 218462, 281701, 436924, 563402, 764617, 1126804, 1529234, 3058468, 5352319, 10704638, 21409276]

約数ペア:

[(1, 21409276), (2, 10704638), (4, 5352319), (7, 3058468), (14, 1529234), (19, 1126804), (28, 764617), (38, 563402), (49, 436924), (76, 281701), (98, 218462), (133, 160972), (196, 109231), (266, 80486), (532, 40243), (931, 22996), (1862, 11498), (3724, 5749)]