21391510

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{305593}}^1$

素因数の和:305607

約数の個数: 16

約数和(自身を含む): 44005536

約数和(自身を除く): 22614026

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 305593, 611186, 1527965, 2139151, 3055930, 4278302, 10695755, 21391510]

約数ペア:

[(1, 21391510), (2, 10695755), (5, 4278302), (7, 3055930), (10, 2139151), (14, 1527965), (35, 611186), (70, 305593)]