31901720

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:368

約数の個数: 64

約数和(自身を含む): 74649600

約数和(自身を除く): 42747880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 71, 94, 142, 188, 235, 239, 284, 355, 376, 470, 478, 568, 710, 940, 956, 1195, 1420, 1880, 1912, 2390, 2840, 3337, 4780, 6674, 9560, 11233, 13348, 16685, 16969, 22466, 26696, 33370, 33938, 44932, 56165, 66740, 67876, 84845, 89864, 112330, 133480, 135752, 169690, 224660, 339380, 449320, 678760, 797543, 1595086, 3190172, 3987715, 6380344, 7975430, 15950860, 31901720]

約数ペア:

[(1, 31901720), (2, 15950860), (4, 7975430), (5, 6380344), (8, 3987715), (10, 3190172), (20, 1595086), (40, 797543), (47, 678760), (71, 449320), (94, 339380), (142, 224660), (188, 169690), (235, 135752), (239, 133480), (284, 112330), (355, 89864), (376, 84845), (470, 67876), (478, 66740), (568, 56165), (710, 44932), (940, 33938), (956, 33370), (1195, 26696), (1420, 22466), (1880, 16969), (1912, 16685), (2390, 13348), (2840, 11233), (3337, 9560), (4780, 6674)]