21815216

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{577}}^1$

素因数の和:741

約数の個数: 40

約数和(自身を含む): 45153360

約数和(自身を除く): 23338144

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 139, 272, 278, 556, 577, 1112, 1154, 2224, 2308, 2363, 4616, 4726, 9232, 9452, 9809, 18904, 19618, 37808, 39236, 78472, 80203, 156944, 160406, 320812, 641624, 1283248, 1363451, 2726902, 5453804, 10907608, 21815216]

約数ペア:

[(1, 21815216), (2, 10907608), (4, 5453804), (8, 2726902), (16, 1363451), (17, 1283248), (34, 641624), (68, 320812), (136, 160406), (139, 156944), (272, 80203), (278, 78472), (556, 39236), (577, 37808), (1112, 19618), (1154, 18904), (2224, 9809), (2308, 9452), (2363, 9232), (4616, 4726)]