21336580

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17489}}^1$

素因数の和:17559

約数の個数: 24

約数和(自身を含む): 45543960

約数和(自身を除く): 24207380

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17489, 34978, 69956, 87445, 174890, 349780, 1066829, 2133658, 4267316, 5334145, 10668290, 21336580]

約数ペア:

[(1, 21336580), (2, 10668290), (4, 5334145), (5, 4267316), (10, 2133658), (20, 1066829), (61, 349780), (122, 174890), (244, 87445), (305, 69956), (610, 34978), (1220, 17489)]