81324680

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{19739}}^1$

素因数の和:19853

約数の個数: 32

約数和(自身を含む): 184766400

約数和(自身を除く): 103441720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 19739, 39478, 78956, 98695, 157912, 197390, 394780, 789560, 2033117, 4066234, 8132468, 10165585, 16264936, 20331170, 40662340, 81324680]

約数ペア:

[(1, 81324680), (2, 40662340), (4, 20331170), (5, 16264936), (8, 10165585), (10, 8132468), (20, 4066234), (40, 2033117), (103, 789560), (206, 394780), (412, 197390), (515, 157912), (824, 98695), (1030, 78956), (2060, 39478), (4120, 19739)]