28021720

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{6427}}^1$

素因数の和:6547

約数の個数: 32

約数和(自身を含む): 63637200

約数和(自身を除く): 35615480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 6427, 12854, 25708, 32135, 51416, 64270, 128540, 257080, 700543, 1401086, 2802172, 3502715, 5604344, 7005430, 14010860, 28021720]

約数ペア:

[(1, 28021720), (2, 14010860), (4, 7005430), (5, 5604344), (8, 3502715), (10, 2802172), (20, 1401086), (40, 700543), (109, 257080), (218, 128540), (436, 64270), (545, 51416), (872, 32135), (1090, 25708), (2180, 12854), (4360, 6427)]