21440188

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{461}}^1$

素因数の和:634

約数の個数: 48

約数和(自身を含む): 47190528

約数和(自身を除く): 25750340

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 151, 154, 302, 308, 461, 604, 922, 1057, 1661, 1844, 2114, 3227, 3322, 4228, 5071, 6454, 6644, 10142, 11627, 12908, 20284, 23254, 35497, 46508, 69611, 70994, 139222, 141988, 278444, 487277, 765721, 974554, 1531442, 1949108, 3062884, 5360047, 10720094, 21440188]

約数ペア:

[(1, 21440188), (2, 10720094), (4, 5360047), (7, 3062884), (11, 1949108), (14, 1531442), (22, 974554), (28, 765721), (44, 487277), (77, 278444), (151, 141988), (154, 139222), (302, 70994), (308, 69611), (461, 46508), (604, 35497), (922, 23254), (1057, 20284), (1661, 12908), (1844, 11627), (2114, 10142), (3227, 6644), (3322, 6454), (4228, 5071)]