18917872

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{443}}^1$

素因数の和:625

約数の個数: 40

約数和(自身を含む): 39144816

約数和(自身を除く): 20226944

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 157, 272, 314, 443, 628, 886, 1256, 1772, 2512, 2669, 3544, 5338, 7088, 7531, 10676, 15062, 21352, 30124, 42704, 60248, 69551, 120496, 139102, 278204, 556408, 1112816, 1182367, 2364734, 4729468, 9458936, 18917872]

約数ペア:

[(1, 18917872), (2, 9458936), (4, 4729468), (8, 2364734), (16, 1182367), (17, 1112816), (34, 556408), (68, 278204), (136, 139102), (157, 120496), (272, 69551), (314, 60248), (443, 42704), (628, 30124), (886, 21352), (1256, 15062), (1772, 10676), (2512, 7531), (2669, 7088), (3544, 5338)]