81011660

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{66403}}^1$

素因数の和:66473

約数の個数: 24

約数和(自身を含む): 172916016

約数和(自身を除く): 91904356

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 66403, 132806, 265612, 332015, 664030, 1328060, 4050583, 8101166, 16202332, 20252915, 40505830, 81011660]

約数ペア:

[(1, 81011660), (2, 40505830), (4, 20252915), (5, 16202332), (10, 8101166), (20, 4050583), (61, 1328060), (122, 664030), (244, 332015), (305, 265612), (610, 132806), (1220, 66403)]