388680980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{273719}}^1$

素因数の和:273799

約数の個数: 24

約数和(自身を含む): 827729280

約数和(自身を除く): 439048300

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 273719, 547438, 1094876, 1368595, 2737190, 5474380, 19434049, 38868098, 77736196, 97170245, 194340490, 388680980]

約数ペア:

[(1, 388680980), (2, 194340490), (4, 97170245), (5, 77736196), (10, 38868098), (20, 19434049), (71, 5474380), (142, 2737190), (284, 1368595), (355, 1094876), (710, 547438), (1420, 273719)]