20905210

素因数分解:

$2^1\times 5^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{283}}^1$

素因数の和:462

約数の個数: 32

約数和(自身を含む): 38646720

約数和(自身を除く): 17741510

約数列:

[1, 2, 5, 10, 83, 89, 166, 178, 283, 415, 445, 566, 830, 890, 1415, 2830, 7387, 14774, 23489, 25187, 36935, 46978, 50374, 73870, 117445, 125935, 234890, 251870, 2090521, 4181042, 10452605, 20905210]

約数ペア:

[(1, 20905210), (2, 10452605), (5, 4181042), (10, 2090521), (83, 251870), (89, 234890), (166, 125935), (178, 117445), (283, 73870), (415, 50374), (445, 46978), (566, 36935), (830, 25187), (890, 23489), (1415, 14774), (2830, 7387)]