21285649

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 30139776

約数和(自身を除く): 8854127

約数列:

[1, 7, 11, 17, 23, 49, 77, 101, 119, 161, 187, 253, 391, 539, 707, 833, 1111, 1127, 1309, 1717, 1771, 2323, 2737, 4301, 4949, 7777, 9163, 12019, 12397, 16261, 18887, 19159, 25553, 30107, 39491, 54439, 84133, 113827, 132209, 178871, 210749, 276437, 434401, 925463, 1252097, 1935059, 3040807, 21285649]

約数ペア:

[(1, 21285649), (7, 3040807), (11, 1935059), (17, 1252097), (23, 925463), (49, 434401), (77, 276437), (101, 210749), (119, 178871), (161, 132209), (187, 113827), (253, 84133), (391, 54439), (539, 39491), (707, 30107), (833, 25553), (1111, 19159), (1127, 18887), (1309, 16261), (1717, 12397), (1771, 12019), (2323, 9163), (2737, 7777), (4301, 4949)]