81503320

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{33403}}^1$

素因数の和:33475

約数の個数: 32

約数和(自身を含む): 186394320

約数和(自身を除く): 104891000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 33403, 66806, 133612, 167015, 267224, 334030, 668060, 1336120, 2037583, 4075166, 8150332, 10187915, 16300664, 20375830, 40751660, 81503320]

約数ペア:

[(1, 81503320), (2, 40751660), (4, 20375830), (5, 16300664), (8, 10187915), (10, 8150332), (20, 4075166), (40, 2037583), (61, 1336120), (122, 668060), (244, 334030), (305, 267224), (488, 167015), (610, 133612), (1220, 66806), (2440, 33403)]