21721886

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{557}}^1$

素因数の和:644

約数の個数: 32

約数和(自身を含む): 36640512

約数和(自身を除く): 14918626

約数列:

[1, 2, 17, 31, 34, 37, 62, 74, 527, 557, 629, 1054, 1114, 1147, 1258, 2294, 9469, 17267, 18938, 19499, 20609, 34534, 38998, 41218, 293539, 350353, 587078, 638879, 700706, 1277758, 10860943, 21721886]

約数ペア:

[(1, 21721886), (2, 10860943), (17, 1277758), (31, 700706), (34, 638879), (37, 587078), (62, 350353), (74, 293539), (527, 41218), (557, 38998), (629, 34534), (1054, 20609), (1114, 19499), (1147, 18938), (1258, 17267), (2294, 9469)]