21639736

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{87257}}^1$

素因数の和:87294

約数の個数: 16

約数和(自身を含む): 41883840

約数和(自身を除く): 20244104

約数列:

[1, 2, 4, 8, 31, 62, 124, 248, 87257, 174514, 349028, 698056, 2704967, 5409934, 10819868, 21639736]

約数ペア:

[(1, 21639736), (2, 10819868), (4, 5409934), (8, 2704967), (31, 698056), (62, 349028), (124, 174514), (248, 87257)]