80310640

素因数分解:

$2^4\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1013}}^1$

素因数の和:2017

約数の個数: 40

約数和(自身を含む): 187095168

約数和(自身を除く): 106784528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 991, 1013, 1982, 2026, 3964, 4052, 4955, 5065, 7928, 8104, 9910, 10130, 15856, 16208, 19820, 20260, 39640, 40520, 79280, 81040, 1003883, 2007766, 4015532, 5019415, 8031064, 10038830, 16062128, 20077660, 40155320, 80310640]

約数ペア:

[(1, 80310640), (2, 40155320), (4, 20077660), (5, 16062128), (8, 10038830), (10, 8031064), (16, 5019415), (20, 4015532), (40, 2007766), (80, 1003883), (991, 81040), (1013, 79280), (1982, 40520), (2026, 39640), (3964, 20260), (4052, 19820), (4955, 16208), (5065, 15856), (7928, 10130), (8104, 9910)]