81453440

素因数分解:

$2^7\times 5^1\times {\mathrm{127271}}^1$

素因数の和:127290

約数の個数: 32

約数和(自身を含む): 194726160

約数和(自身を除く): 113272720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127271, 254542, 509084, 636355, 1018168, 1272710, 2036336, 2545420, 4072672, 5090840, 8145344, 10181680, 16290688, 20363360, 40726720, 81453440]

約数ペア:

[(1, 81453440), (2, 40726720), (4, 20363360), (5, 16290688), (8, 10181680), (10, 8145344), (16, 5090840), (20, 4072672), (32, 2545420), (40, 2036336), (64, 1272710), (80, 1018168), (128, 636355), (160, 509084), (320, 254542), (640, 127271)]