28381720

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{569}}^1$

素因数の和:652

約数の個数: 64

約数和(自身を含む): 67716000

約数和(自身を除く): 39334280

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 43, 58, 86, 116, 145, 172, 215, 232, 290, 344, 430, 569, 580, 860, 1138, 1160, 1247, 1720, 2276, 2494, 2845, 4552, 4988, 5690, 6235, 9976, 11380, 12470, 16501, 22760, 24467, 24940, 33002, 48934, 49880, 66004, 82505, 97868, 122335, 132008, 165010, 195736, 244670, 330020, 489340, 660040, 709543, 978680, 1419086, 2838172, 3547715, 5676344, 7095430, 14190860, 28381720]

約数ペア:

[(1, 28381720), (2, 14190860), (4, 7095430), (5, 5676344), (8, 3547715), (10, 2838172), (20, 1419086), (29, 978680), (40, 709543), (43, 660040), (58, 489340), (86, 330020), (116, 244670), (145, 195736), (172, 165010), (215, 132008), (232, 122335), (290, 97868), (344, 82505), (430, 66004), (569, 49880), (580, 48934), (860, 33002), (1138, 24940), (1160, 24467), (1247, 22760), (1720, 16501), (2276, 12470), (2494, 11380), (2845, 9976), (4552, 6235), (4988, 5690)]