21628160

素因数分解:

$2^8\times 5^1\times {\mathrm{61}}^1\times {\mathrm{277}}^1$

素因数の和:359

約数の個数: 72

約数和(自身を含む): 52845576

約数和(自身を除く): 31217416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 244, 256, 277, 305, 320, 488, 554, 610, 640, 976, 1108, 1220, 1280, 1385, 1952, 2216, 2440, 2770, 3904, 4432, 4880, 5540, 7808, 8864, 9760, 11080, 15616, 16897, 17728, 19520, 22160, 33794, 35456, 39040, 44320, 67588, 70912, 78080, 84485, 88640, 135176, 168970, 177280, 270352, 337940, 354560, 540704, 675880, 1081408, 1351760, 2162816, 2703520, 4325632, 5407040, 10814080, 21628160]

約数ペア:

[(1, 21628160), (2, 10814080), (4, 5407040), (5, 4325632), (8, 2703520), (10, 2162816), (16, 1351760), (20, 1081408), (32, 675880), (40, 540704), (61, 354560), (64, 337940), (80, 270352), (122, 177280), (128, 168970), (160, 135176), (244, 88640), (256, 84485), (277, 78080), (305, 70912), (320, 67588), (488, 44320), (554, 39040), (610, 35456), (640, 33794), (976, 22160), (1108, 19520), (1220, 17728), (1280, 16897), (1385, 15616), (1952, 11080), (2216, 9760), (2440, 8864), (2770, 7808), (3904, 5540), (4432, 4880)]