21565575

素因数分解:

$3^3\times 5^2\times {\mathrm{43}}^1\times {\mathrm{743}}^1$

素因数の和:805

約数の個数: 48

約数和(自身を含む): 40592640

約数和(自身を除く): 19027065

約数列:

[1, 3, 5, 9, 15, 25, 27, 43, 45, 75, 129, 135, 215, 225, 387, 645, 675, 743, 1075, 1161, 1935, 2229, 3225, 3715, 5805, 6687, 9675, 11145, 18575, 20061, 29025, 31949, 33435, 55725, 95847, 100305, 159745, 167175, 287541, 479235, 501525, 798725, 862623, 1437705, 2396175, 4313115, 7188525, 21565575]

約数ペア:

[(1, 21565575), (3, 7188525), (5, 4313115), (9, 2396175), (15, 1437705), (25, 862623), (27, 798725), (43, 501525), (45, 479235), (75, 287541), (129, 167175), (135, 159745), (215, 100305), (225, 95847), (387, 55725), (645, 33435), (675, 31949), (743, 29025), (1075, 20061), (1161, 18575), (1935, 11145), (2229, 9675), (3225, 6687), (3715, 5805)]