21502327

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1$

素因数の和:212

約数の個数: 32

約数和(自身を含む): 28224000

約数和(自身を除く): 6721673

約数列:

[1, 7, 11, 41, 49, 77, 139, 287, 343, 451, 539, 973, 1529, 2009, 3157, 3773, 5699, 6811, 10703, 14063, 22099, 39893, 47677, 62689, 74921, 154693, 279251, 438823, 524447, 1954757, 3071761, 21502327]

約数ペア:

[(1, 21502327), (7, 3071761), (11, 1954757), (41, 524447), (49, 438823), (77, 279251), (139, 154693), (287, 74921), (343, 62689), (451, 47677), (539, 39893), (973, 22099), (1529, 14063), (2009, 10703), (3157, 6811), (3773, 5699)]