21282215

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:227

約数の個数: 32

約数和(自身を含む): 28465344

約数和(自身を除く): 7183129

約数列:

[1, 5, 17, 37, 67, 85, 101, 185, 335, 505, 629, 1139, 1717, 2479, 3145, 3737, 5695, 6767, 8585, 12395, 18685, 33835, 42143, 63529, 115039, 210715, 250379, 317645, 575195, 1251895, 4256443, 21282215]

約数ペア:

[(1, 21282215), (5, 4256443), (17, 1251895), (37, 575195), (67, 317645), (85, 250379), (101, 210715), (185, 115039), (335, 63529), (505, 42143), (629, 33835), (1139, 18685), (1717, 12395), (2479, 8585), (3145, 6767), (3737, 5695)]