21708220

素因数分解:

$2^2\times 5^1\times {\mathrm{727}}^1\times {\mathrm{1493}}^1$

素因数の和:2229

約数の個数: 24

約数和(自身を含む): 45680544

約数和(自身を除く): 23972324

約数列:

[1, 2, 4, 5, 10, 20, 727, 1454, 1493, 2908, 2986, 3635, 5972, 7270, 7465, 14540, 14930, 29860, 1085411, 2170822, 4341644, 5427055, 10854110, 21708220]

約数ペア:

[(1, 21708220), (2, 10854110), (4, 5427055), (5, 4341644), (10, 2170822), (20, 1085411), (727, 29860), (1454, 14930), (1493, 14540), (2908, 7465), (2986, 7270), (3635, 5972)]