21378430

素因数分解:

$2^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{5227}}^1$

素因数の和:5643

約数の個数: 16

約数和(自身を含む): 38582640

約数和(自身を除く): 17204210

約数列:

[1, 2, 5, 10, 409, 818, 2045, 4090, 5227, 10454, 26135, 52270, 2137843, 4275686, 10689215, 21378430]

約数ペア:

[(1, 21378430), (2, 10689215), (5, 4275686), (10, 2137843), (409, 52270), (818, 26135), (2045, 10454), (4090, 5227)]