20449990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 42923520

約数和(自身を除く): 22473530

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 59, 110, 115, 118, 137, 230, 253, 274, 295, 506, 590, 649, 685, 1265, 1298, 1357, 1370, 1507, 2530, 2714, 3014, 3151, 3245, 6302, 6490, 6785, 7535, 8083, 13570, 14927, 15070, 15755, 16166, 29854, 31510, 34661, 40415, 69322, 74635, 80830, 88913, 149270, 173305, 177826, 185909, 346610, 371818, 444565, 889130, 929545, 1859090, 2044999, 4089998, 10224995, 20449990]

約数ペア:

[(1, 20449990), (2, 10224995), (5, 4089998), (10, 2044999), (11, 1859090), (22, 929545), (23, 889130), (46, 444565), (55, 371818), (59, 346610), (110, 185909), (115, 177826), (118, 173305), (137, 149270), (230, 88913), (253, 80830), (274, 74635), (295, 69322), (506, 40415), (590, 34661), (649, 31510), (685, 29854), (1265, 16166), (1298, 15755), (1357, 15070), (1370, 14927), (1507, 13570), (2530, 8083), (2714, 7535), (3014, 6785), (3151, 6490), (3245, 6302)]