21561904

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{251}}^1$

素因数の和:338

約数の個数: 80

約数和(自身を含む): 52496640

約数和(自身を除く): 30934736

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 59, 91, 104, 112, 118, 182, 208, 236, 251, 364, 413, 472, 502, 728, 767, 826, 944, 1004, 1456, 1534, 1652, 1757, 2008, 3068, 3263, 3304, 3514, 4016, 5369, 6136, 6526, 6608, 7028, 10738, 12272, 13052, 14056, 14809, 21476, 22841, 26104, 28112, 29618, 42952, 45682, 52208, 59236, 85904, 91364, 103663, 118472, 182728, 192517, 207326, 236944, 365456, 385034, 414652, 770068, 829304, 1347619, 1540136, 1658608, 2695238, 3080272, 5390476, 10780952, 21561904]

約数ペア:

[(1, 21561904), (2, 10780952), (4, 5390476), (7, 3080272), (8, 2695238), (13, 1658608), (14, 1540136), (16, 1347619), (26, 829304), (28, 770068), (52, 414652), (56, 385034), (59, 365456), (91, 236944), (104, 207326), (112, 192517), (118, 182728), (182, 118472), (208, 103663), (236, 91364), (251, 85904), (364, 59236), (413, 52208), (472, 45682), (502, 42952), (728, 29618), (767, 28112), (826, 26104), (944, 22841), (1004, 21476), (1456, 14809), (1534, 14056), (1652, 13052), (1757, 12272), (2008, 10738), (3068, 7028), (3263, 6608), (3304, 6526), (3514, 6136), (4016, 5369)]