20872220

素因数分解:

$2^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1613}}^1$

素因数の和:2269

約数の個数: 24

約数和(自身を含む): 43926624

約数和(自身を除く): 23054404

約数列:

[1, 2, 4, 5, 10, 20, 647, 1294, 1613, 2588, 3226, 3235, 6452, 6470, 8065, 12940, 16130, 32260, 1043611, 2087222, 4174444, 5218055, 10436110, 20872220]

約数ペア:

[(1, 20872220), (2, 10436110), (4, 5218055), (5, 4174444), (10, 2087222), (20, 1043611), (647, 32260), (1294, 16130), (1613, 12940), (2588, 8065), (3226, 6470), (3235, 6452)]