20539519

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{71}}^1$

素因数の和:136

約数の個数: 48

約数和(自身を含む): 29707776

約数和(自身を除く): 9168257

約数列:

[1, 7, 11, 13, 17, 71, 77, 91, 119, 143, 187, 221, 289, 497, 781, 923, 1001, 1207, 1309, 1547, 2023, 2431, 3179, 3757, 5467, 6461, 8449, 10153, 13277, 15691, 17017, 20519, 22253, 26299, 41327, 71071, 92939, 109837, 143633, 172601, 225709, 266747, 289289, 1208207, 1579963, 1867229, 2934217, 20539519]

約数ペア:

[(1, 20539519), (7, 2934217), (11, 1867229), (13, 1579963), (17, 1208207), (71, 289289), (77, 266747), (91, 225709), (119, 172601), (143, 143633), (187, 109837), (221, 92939), (289, 71071), (497, 41327), (781, 26299), (923, 22253), (1001, 20519), (1207, 17017), (1309, 15691), (1547, 13277), (2023, 10153), (2431, 8449), (3179, 6461), (3757, 5467)]