201991120

素因数分解:

$2^4\times 5^1\times {\mathrm{809}}^1\times {\mathrm{3121}}^1$

素因数の和:3943

約数の個数: 40

約数和(自身を含む): 470360520

約数和(自身を除く): 268369400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 809, 1618, 3121, 3236, 4045, 6242, 6472, 8090, 12484, 12944, 15605, 16180, 24968, 31210, 32360, 49936, 62420, 64720, 124840, 249680, 2524889, 5049778, 10099556, 12624445, 20199112, 25248890, 40398224, 50497780, 100995560, 201991120]

約数ペア:

[(1, 201991120), (2, 100995560), (4, 50497780), (5, 40398224), (8, 25248890), (10, 20199112), (16, 12624445), (20, 10099556), (40, 5049778), (80, 2524889), (809, 249680), (1618, 124840), (3121, 64720), (3236, 62420), (4045, 49936), (6242, 32360), (6472, 31210), (8090, 24968), (12484, 16180), (12944, 15605)]