81147980

素因数分解:

$2^2\times 5^1\times {\mathrm{1123}}^1\times {\mathrm{3613}}^1$

素因数の和:4745

約数の個数: 24

約数和(自身を含む): 170609712

約数和(自身を除く): 89461732

約数列:

[1, 2, 4, 5, 10, 20, 1123, 2246, 3613, 4492, 5615, 7226, 11230, 14452, 18065, 22460, 36130, 72260, 4057399, 8114798, 16229596, 20286995, 40573990, 81147980]

約数ペア:

[(1, 81147980), (2, 40573990), (4, 20286995), (5, 16229596), (10, 8114798), (20, 4057399), (1123, 72260), (2246, 36130), (3613, 22460), (4492, 18065), (5615, 14452), (7226, 11230)]