20079980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{151}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 43538880

約数和(自身を除く): 23458900

約数列:

[1, 2, 4, 5, 10, 20, 61, 109, 122, 151, 218, 244, 302, 305, 436, 545, 604, 610, 755, 1090, 1220, 1510, 2180, 3020, 6649, 9211, 13298, 16459, 18422, 26596, 32918, 33245, 36844, 46055, 65836, 66490, 82295, 92110, 132980, 164590, 184220, 329180, 1003999, 2007998, 4015996, 5019995, 10039990, 20079980]

約数ペア:

[(1, 20079980), (2, 10039990), (4, 5019995), (5, 4015996), (10, 2007998), (20, 1003999), (61, 329180), (109, 184220), (122, 164590), (151, 132980), (218, 92110), (244, 82295), (302, 66490), (305, 65836), (436, 46055), (545, 36844), (604, 33245), (610, 32918), (755, 26596), (1090, 18422), (1220, 16459), (1510, 13298), (2180, 9211), (3020, 6649)]