20815570

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{809}}^1$

素因数の和:930

約数の個数: 32

約数和(自身を含む): 39191040

約数和(自身を除く): 18375470

約数列:

[1, 2, 5, 10, 31, 62, 83, 155, 166, 310, 415, 809, 830, 1618, 2573, 4045, 5146, 8090, 12865, 25079, 25730, 50158, 67147, 125395, 134294, 250790, 335735, 671470, 2081557, 4163114, 10407785, 20815570]

約数ペア:

[(1, 20815570), (2, 10407785), (5, 4163114), (10, 2081557), (31, 671470), (62, 335735), (83, 250790), (155, 134294), (166, 125395), (310, 67147), (415, 50158), (809, 25730), (830, 25079), (1618, 12865), (2573, 8090), (4045, 5146)]