18899890

素因数分解:

$2^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{4621}}^1$

素因数の和:5037

約数の個数: 16

約数和(自身を含む): 34110360

約数和(自身を除く): 15210470

約数列:

[1, 2, 5, 10, 409, 818, 2045, 4090, 4621, 9242, 23105, 46210, 1889989, 3779978, 9449945, 18899890]

約数ペア:

[(1, 18899890), (2, 9449945), (5, 3779978), (10, 1889989), (409, 46210), (818, 23105), (2045, 9242), (4090, 4621)]