21048860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{599}}^1$

素因数の和:866

約数の個数: 48

約数和(自身を含む): 50803200

約数和(自身を除く): 29754340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 251, 502, 599, 1004, 1198, 1255, 1757, 2396, 2510, 2995, 3514, 4193, 5020, 5990, 7028, 8386, 8785, 11980, 16772, 17570, 20965, 35140, 41930, 83860, 150349, 300698, 601396, 751745, 1052443, 1503490, 2104886, 3006980, 4209772, 5262215, 10524430, 21048860]

約数ペア:

[(1, 21048860), (2, 10524430), (4, 5262215), (5, 4209772), (7, 3006980), (10, 2104886), (14, 1503490), (20, 1052443), (28, 751745), (35, 601396), (70, 300698), (140, 150349), (251, 83860), (502, 41930), (599, 35140), (1004, 20965), (1198, 17570), (1255, 16772), (1757, 11980), (2396, 8785), (2510, 8386), (2995, 7028), (3514, 5990), (4193, 5020)]