21157675

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{379}}^1$

素因数の和:436

約数の個数: 48

約数和(自身を含む): 33926400

約数和(自身を除く): 12768725

約数列:

[1, 5, 7, 11, 25, 29, 35, 55, 77, 145, 175, 203, 275, 319, 379, 385, 725, 1015, 1595, 1895, 1925, 2233, 2653, 4169, 5075, 7975, 9475, 10991, 11165, 13265, 20845, 29183, 54955, 55825, 66325, 76937, 104225, 120901, 145915, 274775, 384685, 604505, 729575, 846307, 1923425, 3022525, 4231535, 21157675]

約数ペア:

[(1, 21157675), (5, 4231535), (7, 3022525), (11, 1923425), (25, 846307), (29, 729575), (35, 604505), (55, 384685), (77, 274775), (145, 145915), (175, 120901), (203, 104225), (275, 76937), (319, 66325), (379, 55825), (385, 54955), (725, 29183), (1015, 20845), (1595, 13265), (1895, 11165), (1925, 10991), (2233, 9475), (2653, 7975), (4169, 5075)]