21890830

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{168391}}^1$

素因数の和:168411

約数の個数: 16

約数和(自身を含む): 42434784

約数和(自身を除く): 20543954

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 168391, 336782, 841955, 1683910, 2189083, 4378166, 10945415, 21890830]

約数ペア:

[(1, 21890830), (2, 10945415), (5, 4378166), (10, 2189083), (13, 1683910), (26, 841955), (65, 336782), (130, 168391)]