19721740

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{919}}^1$

素因数の和:994

約数の個数: 48

約数和(自身を含む): 44049600

約数和(自身を除く): 24327860

約数列:

[1, 2, 4, 5, 10, 20, 29, 37, 58, 74, 116, 145, 148, 185, 290, 370, 580, 740, 919, 1073, 1838, 2146, 3676, 4292, 4595, 5365, 9190, 10730, 18380, 21460, 26651, 34003, 53302, 68006, 106604, 133255, 136012, 170015, 266510, 340030, 533020, 680060, 986087, 1972174, 3944348, 4930435, 9860870, 19721740]

約数ペア:

[(1, 19721740), (2, 9860870), (4, 4930435), (5, 3944348), (10, 1972174), (20, 986087), (29, 680060), (37, 533020), (58, 340030), (74, 266510), (116, 170015), (145, 136012), (148, 133255), (185, 106604), (290, 68006), (370, 53302), (580, 34003), (740, 26651), (919, 21460), (1073, 18380), (1838, 10730), (2146, 9190), (3676, 5365), (4292, 4595)]