19897620

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{827}}^1$

素因数の和:1240

約数の個数: 48

約数和(自身を含む): 55919808

約数和(自身を除く): 36022188

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 401, 802, 827, 1203, 1604, 1654, 2005, 2406, 2481, 3308, 4010, 4135, 4812, 4962, 6015, 8020, 8270, 9924, 12030, 12405, 16540, 24060, 24810, 49620, 331627, 663254, 994881, 1326508, 1658135, 1989762, 3316270, 3979524, 4974405, 6632540, 9948810, 19897620]

約数ペア:

[(1, 19897620), (2, 9948810), (3, 6632540), (4, 4974405), (5, 3979524), (6, 3316270), (10, 1989762), (12, 1658135), (15, 1326508), (20, 994881), (30, 663254), (60, 331627), (401, 49620), (802, 24810), (827, 24060), (1203, 16540), (1604, 12405), (1654, 12030), (2005, 9924), (2406, 8270), (2481, 8020), (3308, 6015), (4010, 4962), (4135, 4812)]