28347320

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{16481}}^1$

素因数の和:16535

約数の個数: 32

約数和(自身を含む): 65268720

約数和(自身を除く): 36921400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 16481, 32962, 65924, 82405, 131848, 164810, 329620, 659240, 708683, 1417366, 2834732, 3543415, 5669464, 7086830, 14173660, 28347320]

約数ペア:

[(1, 28347320), (2, 14173660), (4, 7086830), (5, 5669464), (8, 3543415), (10, 2834732), (20, 1417366), (40, 708683), (43, 659240), (86, 329620), (172, 164810), (215, 131848), (344, 82405), (430, 65924), (860, 32962), (1720, 16481)]