18891495

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{19991}}^1$

素因数の和:20012

約数の個数: 32

約数和(自身を含む): 38384640

約数和(自身を除く): 19493145

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945, 19991, 59973, 99955, 139937, 179919, 299865, 419811, 539757, 699685, 899595, 1259433, 2099055, 2698785, 3778299, 6297165, 18891495]

約数ペア:

[(1, 18891495), (3, 6297165), (5, 3778299), (7, 2698785), (9, 2099055), (15, 1259433), (21, 899595), (27, 699685), (35, 539757), (45, 419811), (63, 299865), (105, 179919), (135, 139937), (189, 99955), (315, 59973), (945, 19991)]