21651855

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{647}}^1$

素因数の和:775

約数の個数: 32

約数和(自身を含む): 36578304

約数和(自身を除く): 14926449

約数列:

[1, 3, 5, 15, 23, 69, 97, 115, 291, 345, 485, 647, 1455, 1941, 2231, 3235, 6693, 9705, 11155, 14881, 33465, 44643, 62759, 74405, 188277, 223215, 313795, 941385, 1443457, 4330371, 7217285, 21651855]

約数ペア:

[(1, 21651855), (3, 7217285), (5, 4330371), (15, 1443457), (23, 941385), (69, 313795), (97, 223215), (115, 188277), (291, 74405), (345, 62759), (485, 44643), (647, 33465), (1455, 14881), (1941, 11155), (2231, 9705), (3235, 6693)]