80661520

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{16529}}^1$

素因数の和:16603

約数の個数: 40

約数和(自身を含む): 190623960

約数和(自身を除く): 109962440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4880, 16529, 33058, 66116, 82645, 132232, 165290, 264464, 330580, 661160, 1008269, 1322320, 2016538, 4033076, 5041345, 8066152, 10082690, 16132304, 20165380, 40330760, 80661520]

約数ペア:

[(1, 80661520), (2, 40330760), (4, 20165380), (5, 16132304), (8, 10082690), (10, 8066152), (16, 5041345), (20, 4033076), (40, 2016538), (61, 1322320), (80, 1008269), (122, 661160), (244, 330580), (305, 264464), (488, 165290), (610, 132232), (976, 82645), (1220, 66116), (2440, 33058), (4880, 16529)]