21478720

素因数分解:

$2^6\times 5^1\times {\mathrm{67121}}^1$

素因数の和:67138

約数の個数: 28

約数和(自身を含む): 51146964

約数和(自身を除く): 29668244

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67121, 134242, 268484, 335605, 536968, 671210, 1073936, 1342420, 2147872, 2684840, 4295744, 5369680, 10739360, 21478720]

約数ペア:

[(1, 21478720), (2, 10739360), (4, 5369680), (5, 4295744), (8, 2684840), (10, 2147872), (16, 1342420), (20, 1073936), (32, 671210), (40, 536968), (64, 335605), (80, 268484), (160, 134242), (320, 67121)]