21231728

素因数分解:

$2^4\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1163}}^1$

素因数の和:1341

約数の個数: 40

約数和(自身を含む): 47342208

約数和(自身を除く): 26110480

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 163, 326, 652, 1141, 1163, 1304, 2282, 2326, 2608, 4564, 4652, 8141, 9128, 9304, 16282, 18256, 18608, 32564, 65128, 130256, 189569, 379138, 758276, 1326983, 1516552, 2653966, 3033104, 5307932, 10615864, 21231728]

約数ペア:

[(1, 21231728), (2, 10615864), (4, 5307932), (7, 3033104), (8, 2653966), (14, 1516552), (16, 1326983), (28, 758276), (56, 379138), (112, 189569), (163, 130256), (326, 65128), (652, 32564), (1141, 18608), (1163, 18256), (1304, 16282), (2282, 9304), (2326, 9128), (2608, 8141), (4564, 4652)]