19900928

素因数分解:

$2^9\times {\mathrm{47}}^1\times {\mathrm{827}}^1$

素因数の和:892

約数の個数: 40

約数和(自身を含む): 40658112

約数和(自身を除く): 20757184

約数列:

[1, 2, 4, 8, 16, 32, 47, 64, 94, 128, 188, 256, 376, 512, 752, 827, 1504, 1654, 3008, 3308, 6016, 6616, 12032, 13232, 24064, 26464, 38869, 52928, 77738, 105856, 155476, 211712, 310952, 423424, 621904, 1243808, 2487616, 4975232, 9950464, 19900928]

約数ペア:

[(1, 19900928), (2, 9950464), (4, 4975232), (8, 2487616), (16, 1243808), (32, 621904), (47, 423424), (64, 310952), (94, 211712), (128, 155476), (188, 105856), (256, 77738), (376, 52928), (512, 38869), (752, 26464), (827, 24064), (1504, 13232), (1654, 12032), (3008, 6616), (3308, 6016)]