989904640

素因数分解:

$2^8\times 5^1\times {\mathrm{773363}}^1$

素因数の和:773384

約数の個数: 36

約数和(自身を含む): 2371134024

約数和(自身を除く): 1381229384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 773363, 1546726, 3093452, 3866815, 6186904, 7733630, 12373808, 15467260, 24747616, 30934520, 49495232, 61869040, 98990464, 123738080, 197980928, 247476160, 494952320, 989904640]

約数ペア:

[(1, 989904640), (2, 494952320), (4, 247476160), (5, 197980928), (8, 123738080), (10, 98990464), (16, 61869040), (20, 49495232), (32, 30934520), (40, 24747616), (64, 15467260), (80, 12373808), (128, 7733630), (160, 6186904), (256, 3866815), (320, 3093452), (640, 1546726), (1280, 773363)]