21199395

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1999}}^1$

素因数の和:2115

約数の個数: 32

約数和(自身を含む): 39168000

約数和(自身を除く): 17968605

約数列:

[1, 3, 5, 7, 15, 21, 35, 101, 105, 303, 505, 707, 1515, 1999, 2121, 3535, 5997, 9995, 10605, 13993, 29985, 41979, 69965, 201899, 209895, 605697, 1009495, 1413293, 3028485, 4239879, 7066465, 21199395]

約数ペア:

[(1, 21199395), (3, 7066465), (5, 4239879), (7, 3028485), (15, 1413293), (21, 1009495), (35, 605697), (101, 209895), (105, 201899), (303, 69965), (505, 41979), (707, 29985), (1515, 13993), (1999, 10605), (2121, 9995), (3535, 5997)]