25128621

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2999}}^1$

素因数の和:3038

約数の個数: 36

約数和(自身を含む): 44460000

約数和(自身を除く): 19331379

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 2793, 2999, 8379, 8997, 20993, 26991, 56981, 62979, 146951, 170943, 188937, 398867, 440853, 512829, 1196601, 1322559, 2792069, 3589803, 8376207, 25128621]

約数ペア:

[(1, 25128621), (3, 8376207), (7, 3589803), (9, 2792069), (19, 1322559), (21, 1196601), (49, 512829), (57, 440853), (63, 398867), (133, 188937), (147, 170943), (171, 146951), (399, 62979), (441, 56981), (931, 26991), (1197, 20993), (2793, 8997), (2999, 8379)]