21513107

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{239}}^1$

素因数の和:431

約数の個数: 24

約数和(自身を含む): 27578880

約数和(自身を除く): 6065773

約数列:

[1, 7, 11, 49, 77, 167, 239, 539, 1169, 1673, 1837, 2629, 8183, 11711, 12859, 18403, 39913, 90013, 128821, 279391, 439043, 1955737, 3073301, 21513107]

約数ペア:

[(1, 21513107), (7, 3073301), (11, 1955737), (49, 439043), (77, 279391), (167, 128821), (239, 90013), (539, 39913), (1169, 18403), (1673, 12859), (1837, 11711), (2629, 8183)]