20855920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13721}}^1$

素因数の和:13753

約数の個数: 40

約数和(自身を含む): 51045840

約数和(自身を除く): 30189920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13721, 27442, 54884, 68605, 109768, 137210, 219536, 260699, 274420, 521398, 548840, 1042796, 1097680, 1303495, 2085592, 2606990, 4171184, 5213980, 10427960, 20855920]

約数ペア:

[(1, 20855920), (2, 10427960), (4, 5213980), (5, 4171184), (8, 2606990), (10, 2085592), (16, 1303495), (19, 1097680), (20, 1042796), (38, 548840), (40, 521398), (76, 274420), (80, 260699), (95, 219536), (152, 137210), (190, 109768), (304, 68605), (380, 54884), (760, 27442), (1520, 13721)]