20322080

素因数分解:

$2^5\times 5^1\times {\mathrm{157}}^1\times {\mathrm{809}}^1$

素因数の和:981

約数の個数: 48

約数和(自身を含む): 48376440

約数和(自身を除く): 28054360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 157, 160, 314, 628, 785, 809, 1256, 1570, 1618, 2512, 3140, 3236, 4045, 5024, 6280, 6472, 8090, 12560, 12944, 16180, 25120, 25888, 32360, 64720, 127013, 129440, 254026, 508052, 635065, 1016104, 1270130, 2032208, 2540260, 4064416, 5080520, 10161040, 20322080]

約数ペア:

[(1, 20322080), (2, 10161040), (4, 5080520), (5, 4064416), (8, 2540260), (10, 2032208), (16, 1270130), (20, 1016104), (32, 635065), (40, 508052), (80, 254026), (157, 129440), (160, 127013), (314, 64720), (628, 32360), (785, 25888), (809, 25120), (1256, 16180), (1570, 12944), (1618, 12560), (2512, 8090), (3140, 6472), (3236, 6280), (4045, 5024)]