19869355

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{139}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 7709525

約数列:

[1, 5, 11, 23, 55, 113, 115, 139, 253, 565, 695, 1243, 1265, 1529, 2599, 3197, 6215, 7645, 12995, 15707, 15985, 28589, 35167, 78535, 142945, 172777, 175835, 361261, 863885, 1806305, 3973871, 19869355]

約数ペア:

[(1, 19869355), (5, 3973871), (11, 1806305), (23, 863885), (55, 361261), (113, 175835), (115, 172777), (139, 142945), (253, 78535), (565, 35167), (695, 28589), (1243, 15985), (1265, 15707), (1529, 12995), (2599, 7645), (3197, 6215)]