21253552

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{463}}^1$

素因数の和:641

約数の個数: 40

約数和(自身を含む): 43727360

約数和(自身を除く): 22473808

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 151, 152, 302, 304, 463, 604, 926, 1208, 1852, 2416, 2869, 3704, 5738, 7408, 8797, 11476, 17594, 22952, 35188, 45904, 69913, 70376, 139826, 140752, 279652, 559304, 1118608, 1328347, 2656694, 5313388, 10626776, 21253552]

約数ペア:

[(1, 21253552), (2, 10626776), (4, 5313388), (8, 2656694), (16, 1328347), (19, 1118608), (38, 559304), (76, 279652), (151, 140752), (152, 139826), (302, 70376), (304, 69913), (463, 45904), (604, 35188), (926, 22952), (1208, 17594), (1852, 11476), (2416, 8797), (2869, 7408), (3704, 5738)]