21431515

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{337}}^1$

素因数の和:451

約数の個数: 32

約数和(自身を含む): 31150080

約数和(自身を除く): 9718565

約数列:

[1, 5, 7, 23, 35, 79, 115, 161, 337, 395, 553, 805, 1685, 1817, 2359, 2765, 7751, 9085, 11795, 12719, 26623, 38755, 54257, 63595, 133115, 186361, 271285, 612329, 931805, 3061645, 4286303, 21431515]

約数ペア:

[(1, 21431515), (5, 4286303), (7, 3061645), (23, 931805), (35, 612329), (79, 271285), (115, 186361), (161, 133115), (337, 63595), (395, 54257), (553, 38755), (805, 26623), (1685, 12719), (1817, 11795), (2359, 9085), (2765, 7751)]