20125180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{251}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 44876160

約数和(自身を除く): 24750980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 211, 251, 380, 422, 502, 844, 1004, 1055, 1255, 2110, 2510, 4009, 4220, 4769, 5020, 8018, 9538, 16036, 19076, 20045, 23845, 40090, 47690, 52961, 80180, 95380, 105922, 211844, 264805, 529610, 1006259, 1059220, 2012518, 4025036, 5031295, 10062590, 20125180]

約数ペア:

[(1, 20125180), (2, 10062590), (4, 5031295), (5, 4025036), (10, 2012518), (19, 1059220), (20, 1006259), (38, 529610), (76, 264805), (95, 211844), (190, 105922), (211, 95380), (251, 80180), (380, 52961), (422, 47690), (502, 40090), (844, 23845), (1004, 20045), (1055, 19076), (1255, 16036), (2110, 9538), (2510, 8018), (4009, 5020), (4220, 4769)]