20187975

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{457}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 36346880

約数和(自身を除く): 16158905

約数列:

[1, 3, 5, 15, 19, 25, 31, 57, 75, 93, 95, 155, 285, 457, 465, 475, 589, 775, 1371, 1425, 1767, 2285, 2325, 2945, 6855, 8683, 8835, 11425, 14167, 14725, 26049, 34275, 42501, 43415, 44175, 70835, 130245, 212505, 217075, 269173, 354175, 651225, 807519, 1062525, 1345865, 4037595, 6729325, 20187975]

約数ペア:

[(1, 20187975), (3, 6729325), (5, 4037595), (15, 1345865), (19, 1062525), (25, 807519), (31, 651225), (57, 354175), (75, 269173), (93, 217075), (95, 212505), (155, 130245), (285, 70835), (457, 44175), (465, 43415), (475, 42501), (589, 34275), (775, 26049), (1371, 14725), (1425, 14167), (1767, 11425), (2285, 8835), (2325, 8683), (2945, 6855)]