21009501

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{353}}^1\times {\mathrm{389}}^1$

素因数の和:765

約数の個数: 24

約数和(自身を含む): 32306040

約数和(自身を除く): 11296539

約数列:

[1, 3, 9, 17, 51, 153, 353, 389, 1059, 1167, 3177, 3501, 6001, 6613, 18003, 19839, 54009, 59517, 137317, 411951, 1235853, 2334389, 7003167, 21009501]

約数ペア:

[(1, 21009501), (3, 7003167), (9, 2334389), (17, 1235853), (51, 411951), (153, 137317), (353, 59517), (389, 54009), (1059, 19839), (1167, 18003), (3177, 6613), (3501, 6001)]