20991312

素因数分解:

$2^4\times 3^5\times {\mathrm{5399}}^1$

素因数の和:5422

約数の個数: 60

約数和(自身を含む): 60933600

約数和(自身を除く): 39942288

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 81, 108, 144, 162, 216, 243, 324, 432, 486, 648, 972, 1296, 1944, 3888, 5399, 10798, 16197, 21596, 32394, 43192, 48591, 64788, 86384, 97182, 129576, 145773, 194364, 259152, 291546, 388728, 437319, 583092, 777456, 874638, 1166184, 1311957, 1749276, 2332368, 2623914, 3498552, 5247828, 6997104, 10495656, 20991312]

約数ペア:

[(1, 20991312), (2, 10495656), (3, 6997104), (4, 5247828), (6, 3498552), (8, 2623914), (9, 2332368), (12, 1749276), (16, 1311957), (18, 1166184), (24, 874638), (27, 777456), (36, 583092), (48, 437319), (54, 388728), (72, 291546), (81, 259152), (108, 194364), (144, 145773), (162, 129576), (216, 97182), (243, 86384), (324, 64788), (432, 48591), (486, 43192), (648, 32394), (972, 21596), (1296, 16197), (1944, 10798), (3888, 5399)]