20304640

素因数分解:

$2^8\times 5^1\times {\mathrm{29}}^1\times {\mathrm{547}}^1$

素因数の和:597

約数の個数: 72

約数和(自身を含む): 50405040

約数和(自身を除く): 30100400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145, 160, 232, 256, 290, 320, 464, 547, 580, 640, 928, 1094, 1160, 1280, 1856, 2188, 2320, 2735, 3712, 4376, 4640, 5470, 7424, 8752, 9280, 10940, 15863, 17504, 18560, 21880, 31726, 35008, 37120, 43760, 63452, 70016, 79315, 87520, 126904, 140032, 158630, 175040, 253808, 317260, 350080, 507616, 634520, 700160, 1015232, 1269040, 2030464, 2538080, 4060928, 5076160, 10152320, 20304640]

約数ペア:

[(1, 20304640), (2, 10152320), (4, 5076160), (5, 4060928), (8, 2538080), (10, 2030464), (16, 1269040), (20, 1015232), (29, 700160), (32, 634520), (40, 507616), (58, 350080), (64, 317260), (80, 253808), (116, 175040), (128, 158630), (145, 140032), (160, 126904), (232, 87520), (256, 79315), (290, 70016), (320, 63452), (464, 43760), (547, 37120), (580, 35008), (640, 31726), (928, 21880), (1094, 18560), (1160, 17504), (1280, 15863), (1856, 10940), (2188, 9280), (2320, 8752), (2735, 7424), (3712, 5470), (4376, 4640)]