20947040

素因数分解:

$2^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1471}}^1$

素因数の和:1575

約数の個数: 48

約数和(自身を含む): 50077440

約数和(自身を除く): 29130400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 89, 160, 178, 356, 445, 712, 890, 1424, 1471, 1780, 2848, 2942, 3560, 5884, 7120, 7355, 11768, 14240, 14710, 23536, 29420, 47072, 58840, 117680, 130919, 235360, 261838, 523676, 654595, 1047352, 1309190, 2094704, 2618380, 4189408, 5236760, 10473520, 20947040]

約数ペア:

[(1, 20947040), (2, 10473520), (4, 5236760), (5, 4189408), (8, 2618380), (10, 2094704), (16, 1309190), (20, 1047352), (32, 654595), (40, 523676), (80, 261838), (89, 235360), (160, 130919), (178, 117680), (356, 58840), (445, 47072), (712, 29420), (890, 23536), (1424, 14710), (1471, 14240), (1780, 11768), (2848, 7355), (2942, 7120), (3560, 5884)]