20704960

素因数分解:

$2^6\times 5^1\times {\mathrm{89}}^1\times {\mathrm{727}}^1$

素因数の和:833

約数の個数: 56

約数和(自身を含む): 49926240

約数和(自身を除く): 29221280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 160, 178, 320, 356, 445, 712, 727, 890, 1424, 1454, 1780, 2848, 2908, 3560, 3635, 5696, 5816, 7120, 7270, 11632, 14240, 14540, 23264, 28480, 29080, 46528, 58160, 64703, 116320, 129406, 232640, 258812, 323515, 517624, 647030, 1035248, 1294060, 2070496, 2588120, 4140992, 5176240, 10352480, 20704960]

約数ペア:

[(1, 20704960), (2, 10352480), (4, 5176240), (5, 4140992), (8, 2588120), (10, 2070496), (16, 1294060), (20, 1035248), (32, 647030), (40, 517624), (64, 323515), (80, 258812), (89, 232640), (160, 129406), (178, 116320), (320, 64703), (356, 58160), (445, 46528), (712, 29080), (727, 28480), (890, 23264), (1424, 14540), (1454, 14240), (1780, 11632), (2848, 7270), (2908, 7120), (3560, 5816), (3635, 5696)]