20985216

素因数分解:

$2^7\times 3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{211}}^1$

素因数の和:272

約数の個数: 128

約数和(自身を含む): 65736960

約数和(自身を除く): 44751744

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 37, 42, 48, 56, 64, 74, 84, 96, 111, 112, 128, 148, 168, 192, 211, 222, 224, 259, 296, 336, 384, 422, 444, 448, 518, 592, 633, 672, 777, 844, 888, 896, 1036, 1184, 1266, 1344, 1477, 1554, 1688, 1776, 2072, 2368, 2532, 2688, 2954, 3108, 3376, 3552, 4144, 4431, 4736, 5064, 5908, 6216, 6752, 7104, 7807, 8288, 8862, 10128, 11816, 12432, 13504, 14208, 15614, 16576, 17724, 20256, 23421, 23632, 24864, 27008, 31228, 33152, 35448, 40512, 46842, 47264, 49728, 54649, 62456, 70896, 81024, 93684, 94528, 99456, 109298, 124912, 141792, 163947, 187368, 189056, 218596, 249824, 283584, 327894, 374736, 437192, 499648, 567168, 655788, 749472, 874384, 999296, 1311576, 1498944, 1748768, 2623152, 2997888, 3497536, 5246304, 6995072, 10492608, 20985216]

約数ペア:

[(1, 20985216), (2, 10492608), (3, 6995072), (4, 5246304), (6, 3497536), (7, 2997888), (8, 2623152), (12, 1748768), (14, 1498944), (16, 1311576), (21, 999296), (24, 874384), (28, 749472), (32, 655788), (37, 567168), (42, 499648), (48, 437192), (56, 374736), (64, 327894), (74, 283584), (84, 249824), (96, 218596), (111, 189056), (112, 187368), (128, 163947), (148, 141792), (168, 124912), (192, 109298), (211, 99456), (222, 94528), (224, 93684), (259, 81024), (296, 70896), (336, 62456), (384, 54649), (422, 49728), (444, 47264), (448, 46842), (518, 40512), (592, 35448), (633, 33152), (672, 31228), (777, 27008), (844, 24864), (888, 23632), (896, 23421), (1036, 20256), (1184, 17724), (1266, 16576), (1344, 15614), (1477, 14208), (1554, 13504), (1688, 12432), (1776, 11816), (2072, 10128), (2368, 8862), (2532, 8288), (2688, 7807), (2954, 7104), (3108, 6752), (3376, 6216), (3552, 5908), (4144, 5064), (4431, 4736)]