81333760

素因数分解:

$2^9\times 5^1\times {\mathrm{31771}}^1$

素因数の和:31794

約数の個数: 40

約数和(自身を含む): 195016536

約数和(自身を除く): 113682776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 31771, 63542, 127084, 158855, 254168, 317710, 508336, 635420, 1016672, 1270840, 2033344, 2541680, 4066688, 5083360, 8133376, 10166720, 16266752, 20333440, 40666880, 81333760]

約数ペア:

[(1, 81333760), (2, 40666880), (4, 20333440), (5, 16266752), (8, 10166720), (10, 8133376), (16, 5083360), (20, 4066688), (32, 2541680), (40, 2033344), (64, 1270840), (80, 1016672), (128, 635420), (160, 508336), (256, 317710), (320, 254168), (512, 158855), (640, 127084), (1280, 63542), (2560, 31771)]