21845691

素因数分解:

$3^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{2647}}^1$

素因数の和:2791

約数の個数: 24

約数和(自身を含む): 36351744

約数和(自身を除く): 14506053

約数列:

[1, 3, 7, 9, 21, 63, 131, 393, 917, 1179, 2647, 2751, 7941, 8253, 18529, 23823, 55587, 166761, 346757, 1040271, 2427299, 3120813, 7281897, 21845691]

約数ペア:

[(1, 21845691), (3, 7281897), (7, 3120813), (9, 2427299), (21, 1040271), (63, 346757), (131, 166761), (393, 55587), (917, 23823), (1179, 18529), (2647, 8253), (2751, 7941)]