18419828

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{21221}}^1$

素因数の和:21263

約数の個数: 24

約数和(自身を含む): 38029824

約数和(自身を除く): 19609996

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 217, 434, 868, 21221, 42442, 84884, 148547, 297094, 594188, 657851, 1315702, 2631404, 4604957, 9209914, 18419828]

約数ペア:

[(1, 18419828), (2, 9209914), (4, 4604957), (7, 2631404), (14, 1315702), (28, 657851), (31, 594188), (62, 297094), (124, 148547), (217, 84884), (434, 42442), (868, 21221)]