20145020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{3889}}^1$

素因数の和:3942

約数の個数: 48

約数和(自身を含む): 49667520

約数和(自身を除く): 29522500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 3889, 5180, 7778, 15556, 19445, 27223, 38890, 54446, 77780, 108892, 136115, 143893, 272230, 287786, 544460, 575572, 719465, 1007251, 1438930, 2014502, 2877860, 4029004, 5036255, 10072510, 20145020]

約数ペア:

[(1, 20145020), (2, 10072510), (4, 5036255), (5, 4029004), (7, 2877860), (10, 2014502), (14, 1438930), (20, 1007251), (28, 719465), (35, 575572), (37, 544460), (70, 287786), (74, 272230), (140, 143893), (148, 136115), (185, 108892), (259, 77780), (370, 54446), (518, 38890), (740, 27223), (1036, 19445), (1295, 15556), (2590, 7778), (3889, 5180)]