21000659372

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{2351171}}^1$

素因数の和:2351222

約数の個数: 48

約数和(自身を含む): 47399627520

約数和(自身を除く): 26398968148

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 29, 44, 58, 77, 116, 154, 203, 308, 319, 406, 638, 812, 1276, 2233, 4466, 8932, 2351171, 4702342, 9404684, 16458197, 25862881, 32916394, 51725762, 65832788, 68183959, 103451524, 136367918, 181040167, 272735836, 362080334, 477287713, 724160668, 750023549, 954575426, 1500047098, 1909150852, 3000094196, 5250164843, 10500329686, 21000659372]

約数ペア:

[(1, 21000659372), (2, 10500329686), (4, 5250164843), (7, 3000094196), (11, 1909150852), (14, 1500047098), (22, 954575426), (28, 750023549), (29, 724160668), (44, 477287713), (58, 362080334), (77, 272735836), (116, 181040167), (154, 136367918), (203, 103451524), (308, 68183959), (319, 65832788), (406, 51725762), (638, 32916394), (812, 25862881), (1276, 16458197), (2233, 9404684), (4466, 4702342), (8932, 2351171)]