20263420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:382

約数の個数: 48

約数和(自身を含む): 44241120

約数和(自身を除く): 23977700

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 139, 148, 185, 197, 278, 370, 394, 556, 695, 740, 788, 985, 1390, 1970, 2780, 3940, 5143, 7289, 10286, 14578, 20572, 25715, 27383, 29156, 36445, 51430, 54766, 72890, 102860, 109532, 136915, 145780, 273830, 547660, 1013171, 2026342, 4052684, 5065855, 10131710, 20263420]

約数ペア:

[(1, 20263420), (2, 10131710), (4, 5065855), (5, 4052684), (10, 2026342), (20, 1013171), (37, 547660), (74, 273830), (139, 145780), (148, 136915), (185, 109532), (197, 102860), (278, 72890), (370, 54766), (394, 51430), (556, 36445), (695, 29156), (740, 27383), (788, 25715), (985, 20572), (1390, 14578), (1970, 10286), (2780, 7289), (3940, 5143)]