21147015

素因数分解:

$3^1\times 5^1\times {\mathrm{431}}^1\times {\mathrm{3271}}^1$

素因数の和:3710

約数の個数: 16

約数和(自身を含む): 33924096

約数和(自身を除く): 12777081

約数列:

[1, 3, 5, 15, 431, 1293, 2155, 3271, 6465, 9813, 16355, 49065, 1409801, 4229403, 7049005, 21147015]

約数ペア:

[(1, 21147015), (3, 7049005), (5, 4229403), (15, 1409801), (431, 49065), (1293, 16355), (2155, 9813), (3271, 6465)]