21411440

素因数分解:

$2^4\times 5^1\times {\mathrm{267643}}^1$

素因数の和:267656

約数の個数: 20

約数和(自身を含む): 49781784

約数和(自身を除く): 28370344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267643, 535286, 1070572, 1338215, 2141144, 2676430, 4282288, 5352860, 10705720, 21411440]

約数ペア:

[(1, 21411440), (2, 10705720), (4, 5352860), (5, 4282288), (8, 2676430), (10, 2141144), (16, 1338215), (20, 1070572), (40, 535286), (80, 267643)]