21249920

素因数分解:

$2^7\times 5^1\times {\mathrm{33203}}^1$

素因数の和:33222

約数の個数: 32

約数和(自身を含む): 50802120

約数和(自身を除く): 29552200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33203, 66406, 132812, 166015, 265624, 332030, 531248, 664060, 1062496, 1328120, 2124992, 2656240, 4249984, 5312480, 10624960, 21249920]

約数ペア:

[(1, 21249920), (2, 10624960), (4, 5312480), (5, 4249984), (8, 2656240), (10, 2124992), (16, 1328120), (20, 1062496), (32, 664060), (40, 531248), (64, 332030), (80, 265624), (128, 166015), (160, 132812), (320, 66406), (640, 33203)]