21767920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{14321}}^1$

素因数の和:14353

約数の個数: 40

約数和(自身を含む): 53277840

約数和(自身を除く): 31509920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 14321, 28642, 57284, 71605, 114568, 143210, 229136, 272099, 286420, 544198, 572840, 1088396, 1145680, 1360495, 2176792, 2720990, 4353584, 5441980, 10883960, 21767920]

約数ペア:

[(1, 21767920), (2, 10883960), (4, 5441980), (5, 4353584), (8, 2720990), (10, 2176792), (16, 1360495), (19, 1145680), (20, 1088396), (38, 572840), (40, 544198), (76, 286420), (80, 272099), (95, 229136), (152, 143210), (190, 114568), (304, 71605), (380, 57284), (760, 28642), (1520, 14321)]