21625415

素因数分解:

$5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{1447}}^1$

素因数の和:1527

約数の個数: 24

約数和(自身を含む): 30703392

約数和(自身を除く): 9077977

約数列:

[1, 5, 7, 35, 49, 61, 245, 305, 427, 1447, 2135, 2989, 7235, 10129, 14945, 50645, 70903, 88267, 354515, 441335, 617869, 3089345, 4325083, 21625415]

約数ペア:

[(1, 21625415), (5, 4325083), (7, 3089345), (35, 617869), (49, 441335), (61, 354515), (245, 88267), (305, 70903), (427, 50645), (1447, 14945), (2135, 10129), (2989, 7235)]