21171664

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{277}}^1\times {\mathrm{281}}^1$

素因数の和:583

約数の個数: 40

約数和(自身を含む): 43744968

約数和(自身を除く): 22573304

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 277, 281, 554, 562, 1108, 1124, 2216, 2248, 4432, 4496, 4709, 4777, 9418, 9554, 18836, 19108, 37672, 38216, 75344, 76432, 77837, 155674, 311348, 622696, 1245392, 1323229, 2646458, 5292916, 10585832, 21171664]

約数ペア:

[(1, 21171664), (2, 10585832), (4, 5292916), (8, 2646458), (16, 1323229), (17, 1245392), (34, 622696), (68, 311348), (136, 155674), (272, 77837), (277, 76432), (281, 75344), (554, 38216), (562, 37672), (1108, 19108), (1124, 18836), (2216, 9554), (2248, 9418), (4432, 4777), (4496, 4709)]