21425768

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1549}}^1$

素因数の和:1594

約数の個数: 64

約数和(自身を含む): 52080000

約数和(自身を除く): 30654232

約数列:

[1, 2, 4, 7, 8, 13, 14, 19, 26, 28, 38, 52, 56, 76, 91, 104, 133, 152, 182, 247, 266, 364, 494, 532, 728, 988, 1064, 1549, 1729, 1976, 3098, 3458, 6196, 6916, 10843, 12392, 13832, 20137, 21686, 29431, 40274, 43372, 58862, 80548, 86744, 117724, 140959, 161096, 206017, 235448, 281918, 382603, 412034, 563836, 765206, 824068, 1127672, 1530412, 1648136, 2678221, 3060824, 5356442, 10712884, 21425768]

約数ペア:

[(1, 21425768), (2, 10712884), (4, 5356442), (7, 3060824), (8, 2678221), (13, 1648136), (14, 1530412), (19, 1127672), (26, 824068), (28, 765206), (38, 563836), (52, 412034), (56, 382603), (76, 281918), (91, 235448), (104, 206017), (133, 161096), (152, 140959), (182, 117724), (247, 86744), (266, 80548), (364, 58862), (494, 43372), (532, 40274), (728, 29431), (988, 21686), (1064, 20137), (1549, 13832), (1729, 12392), (1976, 10843), (3098, 6916), (3458, 6196)]