20320640

素因数分解:

$2^7\times 5^1\times {\mathrm{31751}}^1$

素因数の和:31770

約数の個数: 32

約数和(自身を含む): 48580560

約数和(自身を除く): 28259920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 31751, 63502, 127004, 158755, 254008, 317510, 508016, 635020, 1016032, 1270040, 2032064, 2540080, 4064128, 5080160, 10160320, 20320640]

約数ペア:

[(1, 20320640), (2, 10160320), (4, 5080160), (5, 4064128), (8, 2540080), (10, 2032064), (16, 1270040), (20, 1016032), (32, 635020), (40, 508016), (64, 317510), (80, 254008), (128, 158755), (160, 127004), (320, 63502), (640, 31751)]