81380240

素因数分解:

$2^4\times 5^1\times {\mathrm{317}}^1\times {\mathrm{3209}}^1$

素因数の和:3539

約数の個数: 40

約数和(自身を含む): 189865080

約数和(自身を除く): 108484840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 317, 634, 1268, 1585, 2536, 3170, 3209, 5072, 6340, 6418, 12680, 12836, 16045, 25360, 25672, 32090, 51344, 64180, 128360, 256720, 1017253, 2034506, 4069012, 5086265, 8138024, 10172530, 16276048, 20345060, 40690120, 81380240]

約数ペア:

[(1, 81380240), (2, 40690120), (4, 20345060), (5, 16276048), (8, 10172530), (10, 8138024), (16, 5086265), (20, 4069012), (40, 2034506), (80, 1017253), (317, 256720), (634, 128360), (1268, 64180), (1585, 51344), (2536, 32090), (3170, 25672), (3209, 25360), (5072, 16045), (6340, 12836), (6418, 12680)]