21638025

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{5657}}^1$

素因数の和:5690

約数の個数: 36

約数和(自身を含む): 41043132

約数和(自身を除く): 19405107

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 153, 225, 255, 425, 765, 1275, 3825, 5657, 16971, 28285, 50913, 84855, 96169, 141425, 254565, 288507, 424275, 480845, 865521, 1272825, 1442535, 2404225, 4327605, 7212675, 21638025]

約数ペア:

[(1, 21638025), (3, 7212675), (5, 4327605), (9, 2404225), (15, 1442535), (17, 1272825), (25, 865521), (45, 480845), (51, 424275), (75, 288507), (85, 254565), (153, 141425), (225, 96169), (255, 84855), (425, 50913), (765, 28285), (1275, 16971), (3825, 5657)]