20282720

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1163}}^1$

素因数の和:1287

約数の個数: 48

約数和(自身を含む): 48399120

約数和(自身を除く): 28116400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1163, 1744, 2180, 2326, 3488, 4360, 4652, 5815, 8720, 9304, 11630, 17440, 18608, 23260, 37216, 46520, 93040, 126767, 186080, 253534, 507068, 633835, 1014136, 1267670, 2028272, 2535340, 4056544, 5070680, 10141360, 20282720]

約数ペア:

[(1, 20282720), (2, 10141360), (4, 5070680), (5, 4056544), (8, 2535340), (10, 2028272), (16, 1267670), (20, 1014136), (32, 633835), (40, 507068), (80, 253534), (109, 186080), (160, 126767), (218, 93040), (436, 46520), (545, 37216), (872, 23260), (1090, 18608), (1163, 17440), (1744, 11630), (2180, 9304), (2326, 8720), (3488, 5815), (4360, 4652)]