133888640

素因数分解:

$2^7\times 5^1\times {\mathrm{209201}}^1$

素因数の和:209220

約数の個数: 32

約数和(自身を含む): 320079060

約数和(自身を除く): 186190420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 209201, 418402, 836804, 1046005, 1673608, 2092010, 3347216, 4184020, 6694432, 8368040, 13388864, 16736080, 26777728, 33472160, 66944320, 133888640]

約数ペア:

[(1, 133888640), (2, 66944320), (4, 33472160), (5, 26777728), (8, 16736080), (10, 13388864), (16, 8368040), (20, 6694432), (32, 4184020), (40, 3347216), (64, 2092010), (80, 1673608), (128, 1046005), (160, 836804), (320, 418402), (640, 209201)]