81478240

素因数分解:

$2^5\times 5^1\times {\mathrm{509239}}^1$

素因数の和:509254

約数の個数: 24

約数和(自身を含む): 192492720

約数和(自身を除く): 111014480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 509239, 1018478, 2036956, 2546195, 4073912, 5092390, 8147824, 10184780, 16295648, 20369560, 40739120, 81478240]

約数ペア:

[(1, 81478240), (2, 40739120), (4, 20369560), (5, 16295648), (8, 10184780), (10, 8147824), (16, 5092390), (20, 4073912), (32, 2546195), (40, 2036956), (80, 1018478), (160, 509239)]