21524321

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{211}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 28492800

約数和(自身を除く): 6968479

約数列:

[1, 7, 13, 19, 59, 91, 133, 211, 247, 413, 767, 1121, 1477, 1729, 2743, 4009, 5369, 7847, 12449, 14573, 19201, 28063, 52117, 87143, 102011, 161837, 236531, 364819, 1132859, 1655717, 3074903, 21524321]

約数ペア:

[(1, 21524321), (7, 3074903), (13, 1655717), (19, 1132859), (59, 364819), (91, 236531), (133, 161837), (211, 102011), (247, 87143), (413, 52117), (767, 28063), (1121, 19201), (1477, 14573), (1729, 12449), (2743, 7847), (4009, 5369)]