20778811221

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{653977}}^1$

素因数の和:654093

約数の個数: 32

約数和(自身を含む): 33902219520

約数和(自身を除く): 13123408299

約数列:

[1, 3, 7, 17, 21, 51, 89, 119, 267, 357, 623, 1513, 1869, 4539, 10591, 31773, 653977, 1961931, 4577839, 11117609, 13733517, 33352827, 58203953, 77823263, 174611859, 233469789, 407427671, 989467201, 1222283013, 2968401603, 6926270407, 20778811221]

約数ペア:

[(1, 20778811221), (3, 6926270407), (7, 2968401603), (17, 1222283013), (21, 989467201), (51, 407427671), (89, 233469789), (119, 174611859), (267, 77823263), (357, 58203953), (623, 33352827), (1513, 13733517), (1869, 11117609), (4539, 4577839), (10591, 1961931), (31773, 653977)]