1901405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{191}}^1$

素因数の和:388

約数の個数: 16

約数和(自身を含む): 2515968

約数和(自身を除く): 614563

約数列:

[1, 5, 11, 55, 181, 191, 905, 955, 1991, 2101, 9955, 10505, 34571, 172855, 380281, 1901405]

約数ペア:

[(1, 1901405), (5, 380281), (11, 172855), (55, 34571), (181, 10505), (191, 9955), (905, 2101), (955, 1991)]