21041648

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77359}}^1$

素因数の和:77384

約数の個数: 20

約数和(自身を含む): 43166880

約数和(自身を除く): 22125232

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77359, 154718, 309436, 618872, 1237744, 1315103, 2630206, 5260412, 10520824, 21041648]

約数ペア:

[(1, 21041648), (2, 10520824), (4, 5260412), (8, 2630206), (16, 1315103), (17, 1237744), (34, 618872), (68, 309436), (136, 154718), (272, 77359)]