21201785

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{397}}^1\times {\mathrm{971}}^1$

素因数の和:1384

約数の個数: 16

約数和(自身を含む): 27853632

約数和(自身を除く): 6651847

約数列:

[1, 5, 11, 55, 397, 971, 1985, 4367, 4855, 10681, 21835, 53405, 385487, 1927435, 4240357, 21201785]

約数ペア:

[(1, 21201785), (5, 4240357), (11, 1927435), (55, 385487), (397, 53405), (971, 21835), (1985, 10681), (4367, 4855)]