19904945

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{2423}}^1$

素因数の和:2512

約数の個数: 16

約数和(自身を含む): 25132032

約数和(自身を除く): 5227087

約数列:

[1, 5, 31, 53, 155, 265, 1643, 2423, 8215, 12115, 75113, 128419, 375565, 642095, 3980989, 19904945]

約数ペア:

[(1, 19904945), (5, 3980989), (31, 642095), (53, 375565), (155, 128419), (265, 75113), (1643, 12115), (2423, 8215)]