20640430

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{2087}}^1$

素因数の和:2160

約数の個数: 32

約数和(自身を含む): 39688704

約数和(自身を除く): 19048274

約数列:

[1, 2, 5, 10, 23, 43, 46, 86, 115, 215, 230, 430, 989, 1978, 2087, 4174, 4945, 9890, 10435, 20870, 48001, 89741, 96002, 179482, 240005, 448705, 480010, 897410, 2064043, 4128086, 10320215, 20640430]

約数ペア:

[(1, 20640430), (2, 10320215), (5, 4128086), (10, 2064043), (23, 897410), (43, 480010), (46, 448705), (86, 240005), (115, 179482), (215, 96002), (230, 89741), (430, 48001), (989, 20870), (1978, 10435), (2087, 9890), (4174, 4945)]