21985210

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{13009}}^1$

素因数の和:13042

約数の個数: 24

約数和(自身を含む): 42854940

約数和(自身を除く): 20869730

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 13009, 26018, 65045, 130090, 169117, 338234, 845585, 1691170, 2198521, 4397042, 10992605, 21985210]

約数ペア:

[(1, 21985210), (2, 10992605), (5, 4397042), (10, 2198521), (13, 1691170), (26, 845585), (65, 338234), (130, 169117), (169, 130090), (338, 65045), (845, 26018), (1690, 13009)]