20904676

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{4517}}^1$

素因数の和:4623

約数の個数: 24

約数和(自身を含む): 39848760

約数和(自身を除く): 18944084

約数列:

[1, 2, 4, 13, 26, 52, 89, 178, 356, 1157, 2314, 4517, 4628, 9034, 18068, 58721, 117442, 234884, 402013, 804026, 1608052, 5226169, 10452338, 20904676]

約数ペア:

[(1, 20904676), (2, 10452338), (4, 5226169), (13, 1608052), (26, 804026), (52, 402013), (89, 234884), (178, 117442), (356, 58721), (1157, 18068), (2314, 9034), (4517, 4628)]