128429440

素因数分解:

$2^7\times 5^1\times {\mathrm{200671}}^1$

素因数の和:200690

約数の個数: 32

約数和(自身を含む): 307028160

約数和(自身を除く): 178598720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 200671, 401342, 802684, 1003355, 1605368, 2006710, 3210736, 4013420, 6421472, 8026840, 12842944, 16053680, 25685888, 32107360, 64214720, 128429440]

約数ペア:

[(1, 128429440), (2, 64214720), (4, 32107360), (5, 25685888), (8, 16053680), (10, 12842944), (16, 8026840), (20, 6421472), (32, 4013420), (40, 3210736), (64, 2006710), (80, 1605368), (128, 1003355), (160, 802684), (320, 401342), (640, 200671)]