640945906

素因数分解:

$2^1\times {\mathrm{157}}^1\times {\mathrm{853}}^1\times {\mathrm{2393}}^1$

素因数の和:3405

約数の個数: 16

約数和(自身を含む): 969081624

約数和(自身を除く): 328135718

約数列:

[1, 2, 157, 314, 853, 1706, 2393, 4786, 133921, 267842, 375701, 751402, 2041229, 4082458, 320472953, 640945906]

約数ペア:

[(1, 640945906), (2, 320472953), (157, 4082458), (314, 2041229), (853, 751402), (1706, 375701), (2393, 267842), (4786, 133921)]