19745240

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1231}}^1$

素因数の和:1643

約数の個数: 32

約数和(自身を含む): 44573760

約数和(自身を除く): 24828520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1231, 1604, 2005, 2462, 3208, 4010, 4924, 6155, 8020, 9848, 12310, 16040, 24620, 49240, 493631, 987262, 1974524, 2468155, 3949048, 4936310, 9872620, 19745240]

約数ペア:

[(1, 19745240), (2, 9872620), (4, 4936310), (5, 3949048), (8, 2468155), (10, 1974524), (20, 987262), (40, 493631), (401, 49240), (802, 24620), (1231, 16040), (1604, 12310), (2005, 9848), (2462, 8020), (3208, 6155), (4010, 4924)]