20960000

素因数分解:

$2^8\times 5^4\times {\mathrm{131}}^1$

素因数の和:167

約数の個数: 90

約数和(自身を含む): 52680012

約数和(自身を除く): 31720012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 131, 160, 200, 250, 256, 262, 320, 400, 500, 524, 625, 640, 655, 800, 1000, 1048, 1250, 1280, 1310, 1600, 2000, 2096, 2500, 2620, 3200, 3275, 4000, 4192, 5000, 5240, 6400, 6550, 8000, 8384, 10000, 10480, 13100, 16000, 16375, 16768, 20000, 20960, 26200, 32000, 32750, 33536, 40000, 41920, 52400, 65500, 80000, 81875, 83840, 104800, 131000, 160000, 163750, 167680, 209600, 262000, 327500, 419200, 524000, 655000, 838400, 1048000, 1310000, 2096000, 2620000, 4192000, 5240000, 10480000, 20960000]

約数ペア:

[(1, 20960000), (2, 10480000), (4, 5240000), (5, 4192000), (8, 2620000), (10, 2096000), (16, 1310000), (20, 1048000), (25, 838400), (32, 655000), (40, 524000), (50, 419200), (64, 327500), (80, 262000), (100, 209600), (125, 167680), (128, 163750), (131, 160000), (160, 131000), (200, 104800), (250, 83840), (256, 81875), (262, 80000), (320, 65500), (400, 52400), (500, 41920), (524, 40000), (625, 33536), (640, 32750), (655, 32000), (800, 26200), (1000, 20960), (1048, 20000), (1250, 16768), (1280, 16375), (1310, 16000), (1600, 13100), (2000, 10480), (2096, 10000), (2500, 8384), (2620, 8000), (3200, 6550), (3275, 6400), (4000, 5240), (4192, 5000)]