20581575

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{197}}^1\times {\mathrm{199}}^1$

素因数の和:416

約数の個数: 48

約数和(自身を含む): 39283200

約数和(自身を除く): 18701625

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 197, 199, 525, 591, 597, 985, 995, 1379, 1393, 2955, 2985, 4137, 4179, 4925, 4975, 6895, 6965, 14775, 14925, 20685, 20895, 34475, 34825, 39203, 103425, 104475, 117609, 196015, 274421, 588045, 823263, 980075, 1372105, 2940225, 4116315, 6860525, 20581575]

約数ペア:

[(1, 20581575), (3, 6860525), (5, 4116315), (7, 2940225), (15, 1372105), (21, 980075), (25, 823263), (35, 588045), (75, 274421), (105, 196015), (175, 117609), (197, 104475), (199, 103425), (525, 39203), (591, 34825), (597, 34475), (985, 20895), (995, 20685), (1379, 14925), (1393, 14775), (2955, 6965), (2985, 6895), (4137, 4975), (4179, 4925)]