40000640

素因数分解:

$2^7\times 5^1\times {\mathrm{62501}}^1$

素因数の和:62520

約数の個数: 32

約数和(自身を含む): 95628060

約数和(自身を除く): 55627420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 62501, 125002, 250004, 312505, 500008, 625010, 1000016, 1250020, 2000032, 2500040, 4000064, 5000080, 8000128, 10000160, 20000320, 40000640]

約数ペア:

[(1, 40000640), (2, 20000320), (4, 10000160), (5, 8000128), (8, 5000080), (10, 4000064), (16, 2500040), (20, 2000032), (32, 1250020), (40, 1000016), (64, 625010), (80, 500008), (128, 312505), (160, 250004), (320, 125002), (640, 62501)]