21049245

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3517}}^1$

素因数の和:3554

約数の個数: 48

約数和(自身を含む): 43904640

約数和(自身を除く): 22855395

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 45, 57, 63, 95, 105, 133, 171, 285, 315, 399, 665, 855, 1197, 1995, 3517, 5985, 10551, 17585, 24619, 31653, 52755, 66823, 73857, 123095, 158265, 200469, 221571, 334115, 369285, 467761, 601407, 1002345, 1107855, 1403283, 2338805, 3007035, 4209849, 7016415, 21049245]

約数ペア:

[(1, 21049245), (3, 7016415), (5, 4209849), (7, 3007035), (9, 2338805), (15, 1403283), (19, 1107855), (21, 1002345), (35, 601407), (45, 467761), (57, 369285), (63, 334115), (95, 221571), (105, 200469), (133, 158265), (171, 123095), (285, 73857), (315, 66823), (399, 52755), (665, 31653), (855, 24619), (1197, 17585), (1995, 10551), (3517, 5985)]