18978715

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{167}}^1\times {\mathrm{191}}^1$

素因数の和:387

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 8890469

約数列:

[1, 5, 7, 17, 35, 85, 119, 167, 191, 595, 835, 955, 1169, 1337, 2839, 3247, 5845, 6685, 14195, 16235, 19873, 22729, 31897, 99365, 113645, 159485, 223279, 542249, 1116395, 2711245, 3795743, 18978715]

約数ペア:

[(1, 18978715), (5, 3795743), (7, 2711245), (17, 1116395), (35, 542249), (85, 223279), (119, 159485), (167, 113645), (191, 99365), (595, 31897), (835, 22729), (955, 19873), (1169, 16235), (1337, 14195), (2839, 6685), (3247, 5845)]