21539025

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3301}}^1$

素因数の和:3346

約数の個数: 36

約数和(自身を含む): 39921180

約数和(自身を除く): 18382155

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 145, 225, 261, 435, 725, 1305, 2175, 3301, 6525, 9903, 16505, 29709, 49515, 82525, 95729, 148545, 247575, 287187, 478645, 742725, 861561, 1435935, 2393225, 4307805, 7179675, 21539025]

約数ペア:

[(1, 21539025), (3, 7179675), (5, 4307805), (9, 2393225), (15, 1435935), (25, 861561), (29, 742725), (45, 478645), (75, 287187), (87, 247575), (145, 148545), (225, 95729), (261, 82525), (435, 49515), (725, 29709), (1305, 16505), (2175, 9903), (3301, 6525)]