21116979

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{1787}}^1$

素因数の和:1907

約数の個数: 24

約数和(自身を含む): 33192432

約数和(自身を除く): 12075453

約数列:

[1, 3, 9, 13, 39, 101, 117, 303, 909, 1313, 1787, 3939, 5361, 11817, 16083, 23231, 69693, 180487, 209079, 541461, 1624383, 2346331, 7038993, 21116979]

約数ペア:

[(1, 21116979), (3, 7038993), (9, 2346331), (13, 1624383), (39, 541461), (101, 209079), (117, 180487), (303, 69693), (909, 23231), (1313, 16083), (1787, 11817), (3939, 5361)]