65440640

素因数分解:

$2^7\times 5^1\times {\mathrm{102251}}^1$

素因数の和:102270

約数の個数: 32

約数和(自身を含む): 156445560

約数和(自身を除く): 91004920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 102251, 204502, 409004, 511255, 818008, 1022510, 1636016, 2045020, 3272032, 4090040, 6544064, 8180080, 13088128, 16360160, 32720320, 65440640]

約数ペア:

[(1, 65440640), (2, 32720320), (4, 16360160), (5, 13088128), (8, 8180080), (10, 6544064), (16, 4090040), (20, 3272032), (32, 2045020), (40, 1636016), (64, 1022510), (80, 818008), (128, 511255), (160, 409004), (320, 204502), (640, 102251)]