3985940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{401}}^1$

素因数の和:488

約数の個数: 48

約数和(自身を含む): 9725184

約数和(自身を除く): 5739244

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 401, 497, 710, 802, 994, 1420, 1604, 1988, 2005, 2485, 2807, 4010, 4970, 5614, 8020, 9940, 11228, 14035, 28070, 28471, 56140, 56942, 113884, 142355, 199297, 284710, 398594, 569420, 797188, 996485, 1992970, 3985940]

約数ペア:

[(1, 3985940), (2, 1992970), (4, 996485), (5, 797188), (7, 569420), (10, 398594), (14, 284710), (20, 199297), (28, 142355), (35, 113884), (70, 56942), (71, 56140), (140, 28471), (142, 28070), (284, 14035), (355, 11228), (401, 9940), (497, 8020), (710, 5614), (802, 4970), (994, 4010), (1420, 2807), (1604, 2485), (1988, 2005)]