20947456

素因数分解:

$2^9\times {\mathrm{163}}^1\times {\mathrm{251}}^1$

素因数の和:432

約数の個数: 40

約数和(自身を含む): 42278544

約数和(自身を除く): 21331088

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 163, 251, 256, 326, 502, 512, 652, 1004, 1304, 2008, 2608, 4016, 5216, 8032, 10432, 16064, 20864, 32128, 40913, 41728, 64256, 81826, 83456, 128512, 163652, 327304, 654608, 1309216, 2618432, 5236864, 10473728, 20947456]

約数ペア:

[(1, 20947456), (2, 10473728), (4, 5236864), (8, 2618432), (16, 1309216), (32, 654608), (64, 327304), (128, 163652), (163, 128512), (251, 83456), (256, 81826), (326, 64256), (502, 41728), (512, 40913), (652, 32128), (1004, 20864), (1304, 16064), (2008, 10432), (2608, 8032), (4016, 5216)]