19884475

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:160

約数の個数: 48

約数和(自身を含む): 29060640

約数和(自身を除く): 9176165

約数列:

[1, 5, 13, 17, 25, 59, 61, 65, 85, 221, 295, 305, 325, 425, 767, 793, 1003, 1037, 1105, 1475, 1525, 3599, 3835, 3965, 5015, 5185, 5525, 13039, 13481, 17995, 19175, 19825, 25075, 25925, 46787, 61183, 65195, 67405, 89975, 233935, 305915, 325975, 337025, 795379, 1169675, 1529575, 3976895, 19884475]

約数ペア:

[(1, 19884475), (5, 3976895), (13, 1529575), (17, 1169675), (25, 795379), (59, 337025), (61, 325975), (65, 305915), (85, 233935), (221, 89975), (295, 67405), (305, 65195), (325, 61183), (425, 46787), (767, 25925), (793, 25075), (1003, 19825), (1037, 19175), (1105, 17995), (1475, 13481), (1525, 13039), (3599, 5525), (3835, 5185), (3965, 5015)]