20155480

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 47278080

約数和(自身を除く): 27122600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 71, 94, 142, 151, 188, 235, 284, 302, 355, 376, 470, 568, 604, 710, 755, 940, 1208, 1420, 1510, 1880, 2840, 3020, 3337, 6040, 6674, 7097, 10721, 13348, 14194, 16685, 21442, 26696, 28388, 33370, 35485, 42884, 53605, 56776, 66740, 70970, 85768, 107210, 133480, 141940, 214420, 283880, 428840, 503887, 1007774, 2015548, 2519435, 4031096, 5038870, 10077740, 20155480]

約数ペア:

[(1, 20155480), (2, 10077740), (4, 5038870), (5, 4031096), (8, 2519435), (10, 2015548), (20, 1007774), (40, 503887), (47, 428840), (71, 283880), (94, 214420), (142, 141940), (151, 133480), (188, 107210), (235, 85768), (284, 70970), (302, 66740), (355, 56776), (376, 53605), (470, 42884), (568, 35485), (604, 33370), (710, 28388), (755, 26696), (940, 21442), (1208, 16685), (1420, 14194), (1510, 13348), (1880, 10721), (2840, 7097), (3020, 6674), (3337, 6040)]