20640

素因数分解:

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

素因数の和:61

約数の個数: 48

約数和(自身を含む): 66528

約数和(自身を除く): 45888

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 43, 48, 60, 80, 86, 96, 120, 129, 160, 172, 215, 240, 258, 344, 430, 480, 516, 645, 688, 860, 1032, 1290, 1376, 1720, 2064, 2580, 3440, 4128, 5160, 6880, 10320, 20640]

約数ペア:

[(1, 20640), (2, 10320), (3, 6880), (4, 5160), (5, 4128), (6, 3440), (8, 2580), (10, 2064), (12, 1720), (15, 1376), (16, 1290), (20, 1032), (24, 860), (30, 688), (32, 645), (40, 516), (43, 480), (48, 430), (60, 344), (80, 258), (86, 240), (96, 215), (120, 172), (129, 160)]