19804345

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{397}}^1\times {\mathrm{907}}^1$

素因数の和:1320

約数の個数: 16

約数和(自身を含む): 26019648

約数和(自身を除く): 6215303

約数列:

[1, 5, 11, 55, 397, 907, 1985, 4367, 4535, 9977, 21835, 49885, 360079, 1800395, 3960869, 19804345]

約数ペア:

[(1, 19804345), (5, 3960869), (11, 1800395), (55, 360079), (397, 49885), (907, 21835), (1985, 9977), (4367, 4535)]