20865520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20063}}^1$

素因数の和:20089

約数の個数: 40

約数和(自身を含む): 52246656

約数和(自身を除く): 31381136

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20063, 40126, 80252, 100315, 160504, 200630, 260819, 321008, 401260, 521638, 802520, 1043276, 1304095, 1605040, 2086552, 2608190, 4173104, 5216380, 10432760, 20865520]

約数ペア:

[(1, 20865520), (2, 10432760), (4, 5216380), (5, 4173104), (8, 2608190), (10, 2086552), (13, 1605040), (16, 1304095), (20, 1043276), (26, 802520), (40, 521638), (52, 401260), (65, 321008), (80, 260819), (104, 200630), (130, 160504), (208, 100315), (260, 80252), (520, 40126), (1040, 20063)]