21072970

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19333}}^1$

素因数の和:19449

約数の個数: 16

約数和(自身を含む): 38281320

約数和(自身を除く): 17208350

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 19333, 38666, 96665, 193330, 2107297, 4214594, 10536485, 21072970]

約数ペア:

[(1, 21072970), (2, 10536485), (5, 4214594), (10, 2107297), (109, 193330), (218, 96665), (545, 38666), (1090, 19333)]