21318545

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{1741}}^1$

素因数の和:1856

約数の個数: 16

約数和(自身を含む): 26757120

約数和(自身を除く): 5438575

約数列:

[1, 5, 31, 79, 155, 395, 1741, 2449, 8705, 12245, 53971, 137539, 269855, 687695, 4263709, 21318545]

約数ペア:

[(1, 21318545), (5, 4263709), (31, 687695), (79, 269855), (155, 137539), (395, 53971), (1741, 12245), (2449, 8705)]