21545589

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{251}}^1$

素因数の和:369

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 10968459

約数列:

[1, 3, 13, 31, 39, 71, 93, 213, 251, 403, 753, 923, 1209, 2201, 2769, 3263, 6603, 7781, 9789, 17821, 23343, 28613, 53463, 85839, 101153, 231673, 303459, 552451, 695019, 1657353, 7181863, 21545589]

約数ペア:

[(1, 21545589), (3, 7181863), (13, 1657353), (31, 695019), (39, 552451), (71, 303459), (93, 231673), (213, 101153), (251, 85839), (403, 53463), (753, 28613), (923, 23343), (1209, 17821), (2201, 9789), (2769, 7781), (3263, 6603)]