21304815

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{613}}^1$

素因数の和:959

約数の個数: 32

約数和(自身を含む): 39138816

約数和(自身を除く): 17834001

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 331, 613, 993, 1655, 1839, 2317, 3065, 4291, 4965, 6951, 9195, 11585, 12873, 21455, 34755, 64365, 202903, 608709, 1014515, 1420321, 3043545, 4260963, 7101605, 21304815]

約数ペア:

[(1, 21304815), (3, 7101605), (5, 4260963), (7, 3043545), (15, 1420321), (21, 1014515), (35, 608709), (105, 202903), (331, 64365), (613, 34755), (993, 21455), (1655, 12873), (1839, 11585), (2317, 9195), (3065, 6951), (4291, 4965)]