21161744

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{461}}^1$

素因数の和:639

約数の個数: 40

約数和(自身を含む): 43538880

約数和(自身を除く): 22377136

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 151, 152, 302, 304, 461, 604, 922, 1208, 1844, 2416, 2869, 3688, 5738, 7376, 8759, 11476, 17518, 22952, 35036, 45904, 69611, 70072, 139222, 140144, 278444, 556888, 1113776, 1322609, 2645218, 5290436, 10580872, 21161744]

約数ペア:

[(1, 21161744), (2, 10580872), (4, 5290436), (8, 2645218), (16, 1322609), (19, 1113776), (38, 556888), (76, 278444), (151, 140144), (152, 139222), (302, 70072), (304, 69611), (461, 45904), (604, 35036), (922, 22952), (1208, 17518), (1844, 11476), (2416, 8759), (2869, 7376), (3688, 5738)]