81020690

素因数分解:

$2^1\times 5^1\times {\mathrm{1019}}^1\times {\mathrm{7951}}^1$

素因数の和:8977

約数の個数: 16

約数和(自身を含む): 145998720

約数和(自身を除く): 64978030

約数列:

[1, 2, 5, 10, 1019, 2038, 5095, 7951, 10190, 15902, 39755, 79510, 8102069, 16204138, 40510345, 81020690]

約数ペア:

[(1, 81020690), (2, 40510345), (5, 16204138), (10, 8102069), (1019, 79510), (2038, 39755), (5095, 15902), (7951, 10190)]