21387920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{14071}}^1$

素因数の和:14103

約数の個数: 40

約数和(自身を含む): 52347840

約数和(自身を除く): 30959920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 14071, 28142, 56284, 70355, 112568, 140710, 225136, 267349, 281420, 534698, 562840, 1069396, 1125680, 1336745, 2138792, 2673490, 4277584, 5346980, 10693960, 21387920]

約数ペア:

[(1, 21387920), (2, 10693960), (4, 5346980), (5, 4277584), (8, 2673490), (10, 2138792), (16, 1336745), (19, 1125680), (20, 1069396), (38, 562840), (40, 534698), (76, 281420), (80, 267349), (95, 225136), (152, 140710), (190, 112568), (304, 70355), (380, 56284), (760, 28142), (1520, 14071)]