20408975990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{156992123}}^1$

素因数の和:156992143

約数の個数: 16

約数和(自身を含む): 39562015248

約数和(自身を除く): 19153039258

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 156992123, 313984246, 784960615, 1569921230, 2040897599, 4081795198, 10204487995, 20408975990]

約数ペア:

[(1, 20408975990), (2, 10204487995), (5, 4081795198), (10, 2040897599), (13, 1569921230), (26, 784960615), (65, 313984246), (130, 156992123)]