21521285

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{3229}}^1$

素因数の和:3308

約数の個数: 16

約数和(自身を含む): 27287040

約数和(自身を除く): 5765755

約数列:

[1, 5, 31, 43, 155, 215, 1333, 3229, 6665, 16145, 100099, 138847, 500495, 694235, 4304257, 21521285]

約数ペア:

[(1, 21521285), (5, 4304257), (31, 694235), (43, 500495), (155, 138847), (215, 100099), (1333, 16145), (3229, 6665)]