81387975

素因数分解:

$3^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 139852160

約数和(自身を除く): 58464185

約数列:

[1, 3, 5, 15, 25, 37, 75, 111, 139, 185, 211, 417, 555, 633, 695, 925, 1055, 2085, 2775, 3165, 3475, 5143, 5275, 7807, 10425, 15429, 15825, 23421, 25715, 29329, 39035, 77145, 87987, 117105, 128575, 146645, 195175, 385725, 439935, 585525, 733225, 1085173, 2199675, 3255519, 5425865, 16277595, 27129325, 81387975]

約数ペア:

[(1, 81387975), (3, 27129325), (5, 16277595), (15, 5425865), (25, 3255519), (37, 2199675), (75, 1085173), (111, 733225), (139, 585525), (185, 439935), (211, 385725), (417, 195175), (555, 146645), (633, 128575), (695, 117105), (925, 87987), (1055, 77145), (2085, 39035), (2775, 29329), (3165, 25715), (3475, 23421), (5143, 15825), (5275, 15429), (7807, 10425)]