21679160

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13219}}^1$

素因数の和:13271

約数の個数: 32

約数和(自身を含む): 49971600

約数和(自身を除く): 28292440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13219, 26438, 52876, 66095, 105752, 132190, 264380, 528760, 541979, 1083958, 2167916, 2709895, 4335832, 5419790, 10839580, 21679160]

約数ペア:

[(1, 21679160), (2, 10839580), (4, 5419790), (5, 4335832), (8, 2709895), (10, 2167916), (20, 1083958), (40, 541979), (41, 528760), (82, 264380), (164, 132190), (205, 105752), (328, 66095), (410, 52876), (820, 26438), (1640, 13219)]