21556720

素因数分解:

$2^4\times 5^1\times {\mathrm{467}}^1\times {\mathrm{577}}^1$

素因数の和:1057

約数の個数: 40

約数和(自身を含む): 50313744

約数和(自身を除く): 28757024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 467, 577, 934, 1154, 1868, 2308, 2335, 2885, 3736, 4616, 4670, 5770, 7472, 9232, 9340, 11540, 18680, 23080, 37360, 46160, 269459, 538918, 1077836, 1347295, 2155672, 2694590, 4311344, 5389180, 10778360, 21556720]

約数ペア:

[(1, 21556720), (2, 10778360), (4, 5389180), (5, 4311344), (8, 2694590), (10, 2155672), (16, 1347295), (20, 1077836), (40, 538918), (80, 269459), (467, 46160), (577, 37360), (934, 23080), (1154, 18680), (1868, 11540), (2308, 9340), (2335, 9232), (2885, 7472), (3736, 5770), (4616, 4670)]