21205940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151471}}^1$

素因数の和:151487

約数の個数: 24

約数和(自身を含む): 50894592

約数和(自身を除く): 29688652

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151471, 302942, 605884, 757355, 1060297, 1514710, 2120594, 3029420, 4241188, 5301485, 10602970, 21205940]

約数ペア:

[(1, 21205940), (2, 10602970), (4, 5301485), (5, 4241188), (7, 3029420), (10, 2120594), (14, 1514710), (20, 1060297), (28, 757355), (35, 605884), (70, 302942), (140, 151471)]