21897136

素因数分解:

$2^4\times {\mathrm{991}}^1\times {\mathrm{1381}}^1$

素因数の和:2380

約数の個数: 20

約数和(自身を含む): 42499264

約数和(自身を除く): 20602128

約数列:

[1, 2, 4, 8, 16, 991, 1381, 1982, 2762, 3964, 5524, 7928, 11048, 15856, 22096, 1368571, 2737142, 5474284, 10948568, 21897136]

約数ペア:

[(1, 21897136), (2, 10948568), (4, 5474284), (8, 2737142), (16, 1368571), (991, 22096), (1381, 15856), (1982, 11048), (2762, 7928), (3964, 5524)]