21388979

素因数分解:

${\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1\times {\mathrm{113}}^1$

素因数の和:310

約数の個数: 16

約数和(自身を含む): 22900320

約数和(自身を除く): 1511341

約数列:

[1, 29, 61, 107, 113, 1769, 3103, 3277, 6527, 6893, 12091, 189283, 199897, 350639, 737551, 21388979]

約数ペア:

[(1, 21388979), (29, 737551), (61, 350639), (107, 199897), (113, 189283), (1769, 12091), (3103, 6893), (3277, 6527)]