1997289

素因数分解:

$3^2\times 7^3\times {\mathrm{647}}^1$

素因数の和:674

約数の個数: 24

約数和(自身を含む): 3369600

約数和(自身を除く): 1372311

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 647, 1029, 1941, 3087, 4529, 5823, 13587, 31703, 40761, 95109, 221921, 285327, 665763, 1997289]

約数ペア:

[(1, 1997289), (3, 665763), (7, 285327), (9, 221921), (21, 95109), (49, 40761), (63, 31703), (147, 13587), (343, 5823), (441, 4529), (647, 3087), (1029, 1941)]