20188735

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{4337}}^1$

素因数の和:4375

約数の個数: 24

約数和(自身を含む): 29671920

約数和(自身を除く): 9483185

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 665, 931, 4337, 4655, 21685, 30359, 82403, 151795, 212513, 412015, 576821, 1062565, 2884105, 4037747, 20188735]

約数ペア:

[(1, 20188735), (5, 4037747), (7, 2884105), (19, 1062565), (35, 576821), (49, 412015), (95, 212513), (133, 151795), (245, 82403), (665, 30359), (931, 21685), (4337, 4655)]