21731720

素因数分解:

$2^3\times 5^1\times {\mathrm{599}}^1\times {\mathrm{907}}^1$

素因数の和:1517

約数の個数: 32

約数和(自身を含む): 49032000

約数和(自身を除く): 27300280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 599, 907, 1198, 1814, 2396, 2995, 3628, 4535, 4792, 5990, 7256, 9070, 11980, 18140, 23960, 36280, 543293, 1086586, 2173172, 2716465, 4346344, 5432930, 10865860, 21731720]

約数ペア:

[(1, 21731720), (2, 10865860), (4, 5432930), (5, 4346344), (8, 2716465), (10, 2173172), (20, 1086586), (40, 543293), (599, 36280), (907, 23960), (1198, 18140), (1814, 11980), (2396, 9070), (2995, 7256), (3628, 5990), (4535, 4792)]