20991932

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{499}}^1\times {\mathrm{809}}^1$

素因数の和:1325

約数の個数: 24

約数和(自身を含む): 39690000

約数和(自身を除く): 18698068

約数列:

[1, 2, 4, 13, 26, 52, 499, 809, 998, 1618, 1996, 3236, 6487, 10517, 12974, 21034, 25948, 42068, 403691, 807382, 1614764, 5247983, 10495966, 20991932]

約数ペア:

[(1, 20991932), (2, 10495966), (4, 5247983), (13, 1614764), (26, 807382), (52, 403691), (499, 42068), (809, 25948), (998, 21034), (1618, 12974), (1996, 10517), (3236, 6487)]