20878515

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{839}}^1$

素因数の和:936

約数の個数: 48

約数和(自身を含む): 41932800

約数和(自身を除く): 21054285

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 79, 105, 237, 315, 395, 553, 711, 839, 1185, 1659, 2517, 2765, 3555, 4195, 4977, 5873, 7551, 8295, 12585, 17619, 24885, 29365, 37755, 52857, 66281, 88095, 198843, 264285, 331405, 463967, 596529, 994215, 1391901, 2319835, 2982645, 4175703, 6959505, 20878515]

約数ペア:

[(1, 20878515), (3, 6959505), (5, 4175703), (7, 2982645), (9, 2319835), (15, 1391901), (21, 994215), (35, 596529), (45, 463967), (63, 331405), (79, 264285), (105, 198843), (237, 88095), (315, 66281), (395, 52857), (553, 37755), (711, 29365), (839, 24885), (1185, 17619), (1659, 12585), (2517, 8295), (2765, 7551), (3555, 5873), (4195, 4977)]