19290220

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{421}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 42537600

約数和(自身を除く): 23247380

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 79, 116, 145, 158, 290, 316, 395, 421, 580, 790, 842, 1580, 1684, 2105, 2291, 4210, 4582, 8420, 9164, 11455, 12209, 22910, 24418, 33259, 45820, 48836, 61045, 66518, 122090, 133036, 166295, 244180, 332590, 665180, 964511, 1929022, 3858044, 4822555, 9645110, 19290220]

約数ペア:

[(1, 19290220), (2, 9645110), (4, 4822555), (5, 3858044), (10, 1929022), (20, 964511), (29, 665180), (58, 332590), (79, 244180), (116, 166295), (145, 133036), (158, 122090), (290, 66518), (316, 61045), (395, 48836), (421, 45820), (580, 33259), (790, 24418), (842, 22910), (1580, 12209), (1684, 11455), (2105, 9164), (2291, 8420), (4210, 4582)]