21102220

素因数分解:

$2^2\times 5^1\times {\mathrm{811}}^1\times {\mathrm{1301}}^1$

素因数の和:2121

約数の個数: 24

約数和(自身を含む): 44403408

約数和(自身を除く): 23301188

約数列:

[1, 2, 4, 5, 10, 20, 811, 1301, 1622, 2602, 3244, 4055, 5204, 6505, 8110, 13010, 16220, 26020, 1055111, 2110222, 4220444, 5275555, 10551110, 21102220]

約数ペア:

[(1, 21102220), (2, 10551110), (4, 5275555), (5, 4220444), (10, 2110222), (20, 1055111), (811, 26020), (1301, 16220), (1622, 13010), (2602, 8110), (3244, 6505), (4055, 5204)]