21015040

素因数分解:

$2^9\times 5^1\times {\mathrm{8209}}^1$

素因数の和:8232

約数の個数: 40

約数和(自身を含む): 50392980

約数和(自身を除く): 29377940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8209, 16418, 32836, 41045, 65672, 82090, 131344, 164180, 262688, 328360, 525376, 656720, 1050752, 1313440, 2101504, 2626880, 4203008, 5253760, 10507520, 21015040]

約数ペア:

[(1, 21015040), (2, 10507520), (4, 5253760), (5, 4203008), (8, 2626880), (10, 2101504), (16, 1313440), (20, 1050752), (32, 656720), (40, 525376), (64, 328360), (80, 262688), (128, 164180), (160, 131344), (256, 82090), (320, 65672), (512, 41045), (640, 32836), (1280, 16418), (2560, 8209)]