21374829

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2551}}^1$

素因数の和:2590

約数の個数: 36

約数和(自身を含む): 37820640

約数和(自身を除く): 16445811

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 2551, 2793, 7653, 8379, 17857, 22959, 48469, 53571, 124999, 145407, 160713, 339283, 374997, 436221, 1017849, 1124991, 2374981, 3053547, 7124943, 21374829]

約数ペア:

[(1, 21374829), (3, 7124943), (7, 3053547), (9, 2374981), (19, 1124991), (21, 1017849), (49, 436221), (57, 374997), (63, 339283), (133, 160713), (147, 145407), (171, 124999), (399, 53571), (441, 48469), (931, 22959), (1197, 17857), (2551, 8379), (2793, 7653)]