21209600

素因数分解:

$2^9\times 5^2\times {\mathrm{1657}}^1$

素因数の和:1685

約数の個数: 60

約数和(自身を含む): 52580154

約数和(自身を除く): 31370554

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 800, 1280, 1600, 1657, 2560, 3200, 3314, 6400, 6628, 8285, 12800, 13256, 16570, 26512, 33140, 41425, 53024, 66280, 82850, 106048, 132560, 165700, 212096, 265120, 331400, 424192, 530240, 662800, 848384, 1060480, 1325600, 2120960, 2651200, 4241920, 5302400, 10604800, 21209600]

約数ペア:

[(1, 21209600), (2, 10604800), (4, 5302400), (5, 4241920), (8, 2651200), (10, 2120960), (16, 1325600), (20, 1060480), (25, 848384), (32, 662800), (40, 530240), (50, 424192), (64, 331400), (80, 265120), (100, 212096), (128, 165700), (160, 132560), (200, 106048), (256, 82850), (320, 66280), (400, 53024), (512, 41425), (640, 33140), (800, 26512), (1280, 16570), (1600, 13256), (1657, 12800), (2560, 8285), (3200, 6628), (3314, 6400)]