20398720

素因数分解:

$2^7\times 5^1\times {\mathrm{31873}}^1$

素因数の和:31892

約数の個数: 32

約数和(自身を含む): 48767220

約数和(自身を除く): 28368500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 31873, 63746, 127492, 159365, 254984, 318730, 509968, 637460, 1019936, 1274920, 2039872, 2549840, 4079744, 5099680, 10199360, 20398720]

約数ペア:

[(1, 20398720), (2, 10199360), (4, 5099680), (5, 4079744), (8, 2549840), (10, 2039872), (16, 1274920), (20, 1019936), (32, 637460), (40, 509968), (64, 318730), (80, 254984), (128, 159365), (160, 127492), (320, 63746), (640, 31873)]