20723248

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1$

素因数の和:402

約数の個数: 80

約数和(自身を含む): 50718976

約数和(自身を除く): 29995728

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 43, 52, 56, 86, 91, 104, 112, 172, 182, 208, 301, 331, 344, 364, 559, 602, 662, 688, 728, 1118, 1204, 1324, 1456, 2236, 2317, 2408, 2648, 3913, 4303, 4472, 4634, 4816, 5296, 7826, 8606, 8944, 9268, 14233, 15652, 17212, 18536, 28466, 30121, 31304, 34424, 37072, 56932, 60242, 62608, 68848, 99631, 113864, 120484, 185029, 199262, 227728, 240968, 370058, 398524, 481936, 740116, 797048, 1295203, 1480232, 1594096, 2590406, 2960464, 5180812, 10361624, 20723248]

約数ペア:

[(1, 20723248), (2, 10361624), (4, 5180812), (7, 2960464), (8, 2590406), (13, 1594096), (14, 1480232), (16, 1295203), (26, 797048), (28, 740116), (43, 481936), (52, 398524), (56, 370058), (86, 240968), (91, 227728), (104, 199262), (112, 185029), (172, 120484), (182, 113864), (208, 99631), (301, 68848), (331, 62608), (344, 60242), (364, 56932), (559, 37072), (602, 34424), (662, 31304), (688, 30121), (728, 28466), (1118, 18536), (1204, 17212), (1324, 15652), (1456, 14233), (2236, 9268), (2317, 8944), (2408, 8606), (2648, 7826), (3913, 5296), (4303, 4816), (4472, 4634)]