19542820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{421}}^1$

素因数の和:652

約数の個数: 48

約数和(自身を含む): 45089856

約数和(自身を除く): 25547036

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 211, 220, 421, 422, 842, 844, 1055, 1684, 2105, 2110, 2321, 4210, 4220, 4631, 4642, 8420, 9262, 9284, 11605, 18524, 23155, 23210, 46310, 46420, 88831, 92620, 177662, 355324, 444155, 888310, 977141, 1776620, 1954282, 3908564, 4885705, 9771410, 19542820]

約数ペア:

[(1, 19542820), (2, 9771410), (4, 4885705), (5, 3908564), (10, 1954282), (11, 1776620), (20, 977141), (22, 888310), (44, 444155), (55, 355324), (110, 177662), (211, 92620), (220, 88831), (421, 46420), (422, 46310), (842, 23210), (844, 23155), (1055, 18524), (1684, 11605), (2105, 9284), (2110, 9262), (2321, 8420), (4210, 4642), (4220, 4631)]