21000567

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 35093760

約数和(自身を除く): 14093193

約数列:

[1, 3, 7, 19, 21, 49, 57, 73, 103, 133, 147, 219, 309, 399, 511, 721, 931, 1387, 1533, 1957, 2163, 2793, 3577, 4161, 5047, 5871, 7519, 9709, 10731, 13699, 15141, 22557, 29127, 41097, 52633, 67963, 95893, 142861, 157899, 203889, 287679, 368431, 428583, 1000027, 1105293, 3000081, 7000189, 21000567]

約数ペア:

[(1, 21000567), (3, 7000189), (7, 3000081), (19, 1105293), (21, 1000027), (49, 428583), (57, 368431), (73, 287679), (103, 203889), (133, 157899), (147, 142861), (219, 95893), (309, 67963), (399, 52633), (511, 41097), (721, 29127), (931, 22557), (1387, 15141), (1533, 13699), (1957, 10731), (2163, 9709), (2793, 7519), (3577, 5871), (4161, 5047)]