20637728

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{643}}^1$

素因数の和:729

約数の個数: 48

約数和(自身を含む): 43817760

約数和(自身を除く): 23180032

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 59, 68, 118, 136, 236, 272, 472, 544, 643, 944, 1003, 1286, 1888, 2006, 2572, 4012, 5144, 8024, 10288, 10931, 16048, 20576, 21862, 32096, 37937, 43724, 75874, 87448, 151748, 174896, 303496, 349792, 606992, 644929, 1213984, 1289858, 2579716, 5159432, 10318864, 20637728]

約数ペア:

[(1, 20637728), (2, 10318864), (4, 5159432), (8, 2579716), (16, 1289858), (17, 1213984), (32, 644929), (34, 606992), (59, 349792), (68, 303496), (118, 174896), (136, 151748), (236, 87448), (272, 75874), (472, 43724), (544, 37937), (643, 32096), (944, 21862), (1003, 20576), (1286, 16048), (1888, 10931), (2006, 10288), (2572, 8024), (4012, 5144)]