21908535

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{251}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 40134528

約数和(自身を除く): 18225993

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 115, 165, 251, 253, 345, 529, 753, 759, 1255, 1265, 1587, 2645, 2761, 3765, 3795, 5773, 5819, 7935, 8283, 13805, 17319, 17457, 28865, 29095, 41415, 63503, 86595, 87285, 132779, 190509, 317515, 398337, 663895, 952545, 1460569, 1991685, 4381707, 7302845, 21908535]

約数ペア:

[(1, 21908535), (3, 7302845), (5, 4381707), (11, 1991685), (15, 1460569), (23, 952545), (33, 663895), (55, 398337), (69, 317515), (115, 190509), (165, 132779), (251, 87285), (253, 86595), (345, 63503), (529, 41415), (753, 29095), (759, 28865), (1255, 17457), (1265, 17319), (1587, 13805), (2645, 8283), (2761, 7935), (3765, 5819), (3795, 5773)]