21269920

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2713}}^1$

素因数の和:2742

約数の個数: 72

約数和(自身を含む): 58475844

約数和(自身を除く): 37205924

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2713, 3920, 5426, 7840, 10852, 13565, 18991, 21704, 27130, 37982, 43408, 54260, 75964, 86816, 94955, 108520, 132937, 151928, 189910, 217040, 265874, 303856, 379820, 434080, 531748, 607712, 664685, 759640, 1063496, 1329370, 1519280, 2126992, 2658740, 3038560, 4253984, 5317480, 10634960, 21269920]

約数ペア:

[(1, 21269920), (2, 10634960), (4, 5317480), (5, 4253984), (7, 3038560), (8, 2658740), (10, 2126992), (14, 1519280), (16, 1329370), (20, 1063496), (28, 759640), (32, 664685), (35, 607712), (40, 531748), (49, 434080), (56, 379820), (70, 303856), (80, 265874), (98, 217040), (112, 189910), (140, 151928), (160, 132937), (196, 108520), (224, 94955), (245, 86816), (280, 75964), (392, 54260), (490, 43408), (560, 37982), (784, 27130), (980, 21704), (1120, 18991), (1568, 13565), (1960, 10852), (2713, 7840), (3920, 5426)]