21855825

素因数分解:

$3^4\times 5^2\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:316

約数の個数: 60

約数和(自身を含む): 41591088

約数和(自身を除く): 19735263

約数列:

[1, 3, 5, 9, 15, 25, 27, 43, 45, 75, 81, 129, 135, 215, 225, 251, 387, 405, 645, 675, 753, 1075, 1161, 1255, 1935, 2025, 2259, 3225, 3483, 3765, 5805, 6275, 6777, 9675, 10793, 11295, 17415, 18825, 20331, 29025, 32379, 33885, 53965, 56475, 87075, 97137, 101655, 161895, 169425, 269825, 291411, 485685, 508275, 809475, 874233, 1457055, 2428425, 4371165, 7285275, 21855825]

約数ペア:

[(1, 21855825), (3, 7285275), (5, 4371165), (9, 2428425), (15, 1457055), (25, 874233), (27, 809475), (43, 508275), (45, 485685), (75, 291411), (81, 269825), (129, 169425), (135, 161895), (215, 101655), (225, 97137), (251, 87075), (387, 56475), (405, 53965), (645, 33885), (675, 32379), (753, 29025), (1075, 20331), (1161, 18825), (1255, 17415), (1935, 11295), (2025, 10793), (2259, 9675), (3225, 6777), (3483, 6275), (3765, 5805)]