8400640

素因数分解:

$2^8\times 5^1\times {\mathrm{6563}}^1$

素因数の和:6584

約数の個数: 36

約数和(自身を含む): 20125224

約数和(自身を除く): 11724584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 6563, 13126, 26252, 32815, 52504, 65630, 105008, 131260, 210016, 262520, 420032, 525040, 840064, 1050080, 1680128, 2100160, 4200320, 8400640]

約数ペア:

[(1, 8400640), (2, 4200320), (4, 2100160), (5, 1680128), (8, 1050080), (10, 840064), (16, 525040), (20, 420032), (32, 262520), (40, 210016), (64, 131260), (80, 105008), (128, 65630), (160, 52504), (256, 32815), (320, 26252), (640, 13126), (1280, 6563)]