81268360

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65539}}^1$

素因数の和:65581

約数の個数: 32

約数和(自身を含む): 188755200

約数和(自身を除く): 107486840

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65539, 131078, 262156, 327695, 524312, 655390, 1310780, 2031709, 2621560, 4063418, 8126836, 10158545, 16253672, 20317090, 40634180, 81268360]

約数ペア:

[(1, 81268360), (2, 40634180), (4, 20317090), (5, 16253672), (8, 10158545), (10, 8126836), (20, 4063418), (31, 2621560), (40, 2031709), (62, 1310780), (124, 655390), (155, 524312), (248, 327695), (310, 262156), (620, 131078), (1240, 65539)]