1981990

素因数分解:

$2^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{4217}}^1$

素因数の和:4271

約数の個数: 16

約数和(自身を含む): 3644352

約数和(自身を除く): 1662362

約数列:

[1, 2, 5, 10, 47, 94, 235, 470, 4217, 8434, 21085, 42170, 198199, 396398, 990995, 1981990]

約数ペア:

[(1, 1981990), (2, 990995), (5, 396398), (10, 198199), (47, 42170), (94, 21085), (235, 8434), (470, 4217)]