21256304

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{751}}^1$

素因数の和:849

約数の個数: 40

約数和(自身を含む): 43360320

約数和(自身を除く): 22104016

約数列:

[1, 2, 4, 8, 16, 29, 58, 61, 116, 122, 232, 244, 464, 488, 751, 976, 1502, 1769, 3004, 3538, 6008, 7076, 12016, 14152, 21779, 28304, 43558, 45811, 87116, 91622, 174232, 183244, 348464, 366488, 732976, 1328519, 2657038, 5314076, 10628152, 21256304]

約数ペア:

[(1, 21256304), (2, 10628152), (4, 5314076), (8, 2657038), (16, 1328519), (29, 732976), (58, 366488), (61, 348464), (116, 183244), (122, 174232), (232, 91622), (244, 87116), (464, 45811), (488, 43558), (751, 28304), (976, 21779), (1502, 14152), (1769, 12016), (3004, 7076), (3538, 6008)]