21720650

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{229}}^1\times {\mathrm{271}}^1$

素因数の和:519

約数の個数: 48

約数和(自身を含む): 46544640

約数和(自身を除く): 24823990

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 175, 229, 271, 350, 458, 542, 1145, 1355, 1603, 1897, 2290, 2710, 3206, 3794, 5725, 6775, 8015, 9485, 11450, 13550, 16030, 18970, 40075, 47425, 62059, 80150, 94850, 124118, 310295, 434413, 620590, 868826, 1551475, 2172065, 3102950, 4344130, 10860325, 21720650]

約数ペア:

[(1, 21720650), (2, 10860325), (5, 4344130), (7, 3102950), (10, 2172065), (14, 1551475), (25, 868826), (35, 620590), (50, 434413), (70, 310295), (175, 124118), (229, 94850), (271, 80150), (350, 62059), (458, 47425), (542, 40075), (1145, 18970), (1355, 16030), (1603, 13550), (1897, 11450), (2290, 9485), (2710, 8015), (3206, 6775), (3794, 5725)]