20655388

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{491}}^1\times {\mathrm{809}}^1$

素因数の和:1317

約数の個数: 24

約数和(自身を含む): 39054960

約数和(自身を除く): 18399572

約数列:

[1, 2, 4, 13, 26, 52, 491, 809, 982, 1618, 1964, 3236, 6383, 10517, 12766, 21034, 25532, 42068, 397219, 794438, 1588876, 5163847, 10327694, 20655388]

約数ペア:

[(1, 20655388), (2, 10327694), (4, 5163847), (13, 1588876), (26, 794438), (52, 397219), (491, 42068), (809, 25532), (982, 21034), (1618, 12766), (1964, 10517), (3236, 6383)]