21947216

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{283}}^1$

素因数の和:459

約数の個数: 40

約数和(自身を含む): 44160864

約数和(自身を除く): 22213648

約数列:

[1, 2, 4, 8, 16, 37, 74, 131, 148, 262, 283, 296, 524, 566, 592, 1048, 1132, 2096, 2264, 4528, 4847, 9694, 10471, 19388, 20942, 37073, 38776, 41884, 74146, 77552, 83768, 148292, 167536, 296584, 593168, 1371701, 2743402, 5486804, 10973608, 21947216]

約数ペア:

[(1, 21947216), (2, 10973608), (4, 5486804), (8, 2743402), (16, 1371701), (37, 593168), (74, 296584), (131, 167536), (148, 148292), (262, 83768), (283, 77552), (296, 74146), (524, 41884), (566, 38776), (592, 37073), (1048, 20942), (1132, 19388), (2096, 10471), (2264, 9694), (4528, 4847)]