20278905

素因数分解:

$3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:353

約数の個数: 32

約数和(自身を含む): 33369600

約数和(自身を除く): 13090695

約数列:

[1, 3, 5, 15, 79, 109, 157, 237, 327, 395, 471, 545, 785, 1185, 1635, 2355, 8611, 12403, 17113, 25833, 37209, 43055, 51339, 62015, 85565, 129165, 186045, 256695, 1351927, 4055781, 6759635, 20278905]

約数ペア:

[(1, 20278905), (3, 6759635), (5, 4055781), (15, 1351927), (79, 256695), (109, 186045), (157, 129165), (237, 85565), (327, 62015), (395, 51339), (471, 43055), (545, 37209), (785, 25833), (1185, 17113), (1635, 12403), (2355, 8611)]