21026552

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{349}}^1\times {\mathrm{443}}^1$

素因数の和:815

約数の個数: 32

約数和(自身を含む): 41958000

約数和(自身を除く): 20931448

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 349, 443, 698, 886, 1396, 1772, 2792, 3544, 5933, 7531, 11866, 15062, 23732, 30124, 47464, 60248, 154607, 309214, 618428, 1236856, 2628319, 5256638, 10513276, 21026552]

約数ペア:

[(1, 21026552), (2, 10513276), (4, 5256638), (8, 2628319), (17, 1236856), (34, 618428), (68, 309214), (136, 154607), (349, 60248), (443, 47464), (698, 30124), (886, 23732), (1396, 15062), (1772, 11866), (2792, 7531), (3544, 5933)]