21031580

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17239}}^1$

素因数の和:17309

約数の個数: 24

約数和(自身を含む): 44892960

約数和(自身を除く): 23861380

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17239, 34478, 68956, 86195, 172390, 344780, 1051579, 2103158, 4206316, 5257895, 10515790, 21031580]

約数ペア:

[(1, 21031580), (2, 10515790), (4, 5257895), (5, 4206316), (10, 2103158), (20, 1051579), (61, 344780), (122, 172390), (244, 86195), (305, 68956), (610, 34478), (1220, 17239)]