21317336

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{1999}}^1$

素因数の和:2079

約数の個数: 32

約数和(自身を含む): 42240000

約数和(自身を除く): 20922664

約数列:

[1, 2, 4, 8, 31, 43, 62, 86, 124, 172, 248, 344, 1333, 1999, 2666, 3998, 5332, 7996, 10664, 15992, 61969, 85957, 123938, 171914, 247876, 343828, 495752, 687656, 2664667, 5329334, 10658668, 21317336]

約数ペア:

[(1, 21317336), (2, 10658668), (4, 5329334), (8, 2664667), (31, 687656), (43, 495752), (62, 343828), (86, 247876), (124, 171914), (172, 123938), (248, 85957), (344, 61969), (1333, 15992), (1999, 10664), (2666, 7996), (3998, 5332)]