640665904

素因数分解:

$2^4\times {\mathrm{1607}}^1\times {\mathrm{24917}}^1$

素因数の和:26532

約数の個数: 20

約数和(自身を含む): 1242112464

約数和(自身を除く): 601446560

約数列:

[1, 2, 4, 8, 16, 1607, 3214, 6428, 12856, 24917, 25712, 49834, 99668, 199336, 398672, 40041619, 80083238, 160166476, 320332952, 640665904]

約数ペア:

[(1, 640665904), (2, 320332952), (4, 160166476), (8, 80083238), (16, 40041619), (1607, 398672), (3214, 199336), (6428, 99668), (12856, 49834), (24917, 25712)]