31420431

素因数分解:

$3^2\times 7^1\times {\mathrm{251}}^1\times {\mathrm{1987}}^1$

素因数の和:2251

約数の個数: 24

約数和(自身を含む): 52101504

約数和(自身を除く): 20681073

約数列:

[1, 3, 7, 9, 21, 63, 251, 753, 1757, 1987, 2259, 5271, 5961, 13909, 15813, 17883, 41727, 125181, 498737, 1496211, 3491159, 4488633, 10473477, 31420431]

約数ペア:

[(1, 31420431), (3, 10473477), (7, 4488633), (9, 3491159), (21, 1496211), (63, 498737), (251, 125181), (753, 41727), (1757, 17883), (1987, 15813), (2259, 13909), (5271, 5961)]