21007540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{937}}^1$

素因数の和:1024

約数の個数: 48

約数和(自身を含む): 47275200

約数和(自身を除く): 26267660

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 59, 76, 95, 118, 190, 236, 295, 380, 590, 937, 1121, 1180, 1874, 2242, 3748, 4484, 4685, 5605, 9370, 11210, 17803, 18740, 22420, 35606, 55283, 71212, 89015, 110566, 178030, 221132, 276415, 356060, 552830, 1050377, 1105660, 2100754, 4201508, 5251885, 10503770, 21007540]

約数ペア:

[(1, 21007540), (2, 10503770), (4, 5251885), (5, 4201508), (10, 2100754), (19, 1105660), (20, 1050377), (38, 552830), (59, 356060), (76, 276415), (95, 221132), (118, 178030), (190, 110566), (236, 89015), (295, 71212), (380, 55283), (590, 35606), (937, 22420), (1121, 18740), (1180, 17803), (1874, 11210), (2242, 9370), (3748, 5605), (4484, 4685)]