21136984

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:304

約数の個数: 64

約数和(自身を含む): 46656000

約数和(自身を除く): 25519016

約数列:

[1, 2, 4, 8, 11, 17, 22, 34, 44, 68, 71, 88, 136, 142, 187, 199, 284, 374, 398, 568, 748, 781, 796, 1207, 1496, 1562, 1592, 2189, 2414, 3124, 3383, 4378, 4828, 6248, 6766, 8756, 9656, 13277, 13532, 14129, 17512, 26554, 27064, 28258, 37213, 53108, 56516, 74426, 106216, 113032, 148852, 155419, 240193, 297704, 310838, 480386, 621676, 960772, 1243352, 1921544, 2642123, 5284246, 10568492, 21136984]

約数ペア:

[(1, 21136984), (2, 10568492), (4, 5284246), (8, 2642123), (11, 1921544), (17, 1243352), (22, 960772), (34, 621676), (44, 480386), (68, 310838), (71, 297704), (88, 240193), (136, 155419), (142, 148852), (187, 113032), (199, 106216), (284, 74426), (374, 56516), (398, 53108), (568, 37213), (748, 28258), (781, 27064), (796, 26554), (1207, 17512), (1496, 14129), (1562, 13532), (1592, 13277), (2189, 9656), (2414, 8756), (3124, 6766), (3383, 6248), (4378, 4828)]