20464640

素因数分解:

$2^{10}\times 5^1\times 7^1\times {\mathrm{571}}^1$

素因数の和:603

約数の個数: 88

約数和(自身を含む): 56202432

約数和(自身を除く): 35737792

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 256, 280, 320, 448, 512, 560, 571, 640, 896, 1024, 1120, 1142, 1280, 1792, 2240, 2284, 2560, 2855, 3584, 3997, 4480, 4568, 5120, 5710, 7168, 7994, 8960, 9136, 11420, 15988, 17920, 18272, 19985, 22840, 31976, 35840, 36544, 39970, 45680, 63952, 73088, 79940, 91360, 127904, 146176, 159880, 182720, 255808, 292352, 319760, 365440, 511616, 584704, 639520, 730880, 1023232, 1279040, 1461760, 2046464, 2558080, 2923520, 4092928, 5116160, 10232320, 20464640]

約数ペア:

[(1, 20464640), (2, 10232320), (4, 5116160), (5, 4092928), (7, 2923520), (8, 2558080), (10, 2046464), (14, 1461760), (16, 1279040), (20, 1023232), (28, 730880), (32, 639520), (35, 584704), (40, 511616), (56, 365440), (64, 319760), (70, 292352), (80, 255808), (112, 182720), (128, 159880), (140, 146176), (160, 127904), (224, 91360), (256, 79940), (280, 73088), (320, 63952), (448, 45680), (512, 39970), (560, 36544), (571, 35840), (640, 31976), (896, 22840), (1024, 19985), (1120, 18272), (1142, 17920), (1280, 15988), (1792, 11420), (2240, 9136), (2284, 8960), (2560, 7994), (2855, 7168), (3584, 5710), (3997, 5120), (4480, 4568)]