21966080

素因数分解:

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

素因数の和:283

約数の個数: 54

約数和(自身を含む): 53020338

約数和(自身を除く): 31054258

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 131, 160, 256, 262, 320, 524, 640, 655, 1048, 1280, 1310, 2096, 2620, 4192, 5240, 8384, 10480, 16768, 17161, 20960, 33536, 34322, 41920, 68644, 83840, 85805, 137288, 167680, 171610, 274576, 343220, 549152, 686440, 1098304, 1372880, 2196608, 2745760, 4393216, 5491520, 10983040, 21966080]

約数ペア:

[(1, 21966080), (2, 10983040), (4, 5491520), (5, 4393216), (8, 2745760), (10, 2196608), (16, 1372880), (20, 1098304), (32, 686440), (40, 549152), (64, 343220), (80, 274576), (128, 171610), (131, 167680), (160, 137288), (256, 85805), (262, 83840), (320, 68644), (524, 41920), (640, 34322), (655, 33536), (1048, 20960), (1280, 17161), (1310, 16768), (2096, 10480), (2620, 8384), (4192, 5240)]