18190540

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{397}}^1$

素因数の和:514

約数の個数: 48

約数和(自身を含む): 40118400

約数和(自身を除く): 21927860

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 79, 116, 145, 158, 290, 316, 395, 397, 580, 790, 794, 1580, 1588, 1985, 2291, 3970, 4582, 7940, 9164, 11455, 11513, 22910, 23026, 31363, 45820, 46052, 57565, 62726, 115130, 125452, 156815, 230260, 313630, 627260, 909527, 1819054, 3638108, 4547635, 9095270, 18190540]

約数ペア:

[(1, 18190540), (2, 9095270), (4, 4547635), (5, 3638108), (10, 1819054), (20, 909527), (29, 627260), (58, 313630), (79, 230260), (116, 156815), (145, 125452), (158, 115130), (290, 62726), (316, 57565), (395, 46052), (397, 45820), (580, 31363), (790, 23026), (794, 22910), (1580, 11513), (1588, 11455), (1985, 9164), (2291, 7940), (3970, 4582)]