21400456

素因数分解:

$2^3\times 7^3\times {\mathrm{11}}^1\times {\mathrm{709}}^1$

素因数の和:747

約数の個数: 64

約数和(自身を含む): 51120000

約数和(自身を除く): 29719544

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 49, 56, 77, 88, 98, 154, 196, 308, 343, 392, 539, 616, 686, 709, 1078, 1372, 1418, 2156, 2744, 2836, 3773, 4312, 4963, 5672, 7546, 7799, 9926, 15092, 15598, 19852, 30184, 31196, 34741, 39704, 54593, 62392, 69482, 109186, 138964, 218372, 243187, 277928, 382151, 436744, 486374, 764302, 972748, 1528604, 1945496, 2675057, 3057208, 5350114, 10700228, 21400456]

約数ペア:

[(1, 21400456), (2, 10700228), (4, 5350114), (7, 3057208), (8, 2675057), (11, 1945496), (14, 1528604), (22, 972748), (28, 764302), (44, 486374), (49, 436744), (56, 382151), (77, 277928), (88, 243187), (98, 218372), (154, 138964), (196, 109186), (308, 69482), (343, 62392), (392, 54593), (539, 39704), (616, 34741), (686, 31196), (709, 30184), (1078, 19852), (1372, 15598), (1418, 15092), (2156, 9926), (2744, 7799), (2836, 7546), (3773, 5672), (4312, 4963)]