21760

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1$

素因数の和:38

約数の個数: 36

約数和(自身を含む): 55188

約数和(自身を除く): 33428

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 544, 640, 680, 1088, 1280, 1360, 2176, 2720, 4352, 5440, 10880, 21760]

約数ペア:

[(1, 21760), (2, 10880), (4, 5440), (5, 4352), (8, 2720), (10, 2176), (16, 1360), (17, 1280), (20, 1088), (32, 680), (34, 640), (40, 544), (64, 340), (68, 320), (80, 272), (85, 256), (128, 170), (136, 160)]