21780190

素因数分解:

$2^1\times 5^1\times {\mathrm{229}}^1\times {\mathrm{9511}}^1$

素因数の和:9747

約数の個数: 16

約数和(自身を含む): 39379680

約数和(自身を除く): 17599490

約数列:

[1, 2, 5, 10, 229, 458, 1145, 2290, 9511, 19022, 47555, 95110, 2178019, 4356038, 10890095, 21780190]

約数ペア:

[(1, 21780190), (2, 10890095), (5, 4356038), (10, 2178019), (229, 95110), (458, 47555), (1145, 19022), (2290, 9511)]