21720144

素因数分解:

$2^4\times 3^1\times {\mathrm{107}}^1\times {\mathrm{4229}}^1$

素因数の和:4347

約数の個数: 40

約数和(自身を含む): 56648160

約数和(自身を除く): 34928016

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 107, 214, 321, 428, 642, 856, 1284, 1712, 2568, 4229, 5136, 8458, 12687, 16916, 25374, 33832, 50748, 67664, 101496, 202992, 452503, 905006, 1357509, 1810012, 2715018, 3620024, 5430036, 7240048, 10860072, 21720144]

約数ペア:

[(1, 21720144), (2, 10860072), (3, 7240048), (4, 5430036), (6, 3620024), (8, 2715018), (12, 1810012), (16, 1357509), (24, 905006), (48, 452503), (107, 202992), (214, 101496), (321, 67664), (428, 50748), (642, 33832), (856, 25374), (1284, 16916), (1712, 12687), (2568, 8458), (4229, 5136)]