21535990

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{43951}}^1$

素因数の和:43972

約数の個数: 24

約数和(自身を含む): 45094752

約数和(自身を除く): 23558762

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 43951, 87902, 219755, 307657, 439510, 615314, 1538285, 2153599, 3076570, 4307198, 10767995, 21535990]

約数ペア:

[(1, 21535990), (2, 10767995), (5, 4307198), (7, 3076570), (10, 2153599), (14, 1538285), (35, 615314), (49, 439510), (70, 307657), (98, 219755), (245, 87902), (490, 43951)]