21687352

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{557}}^1$

素因数の和:751

約数の個数: 32

約数和(自身を含む): 42318720

約数和(自身を除く): 20631368

約数列:

[1, 2, 4, 8, 31, 62, 124, 157, 248, 314, 557, 628, 1114, 1256, 2228, 4456, 4867, 9734, 17267, 19468, 34534, 38936, 69068, 87449, 138136, 174898, 349796, 699592, 2710919, 5421838, 10843676, 21687352]

約数ペア:

[(1, 21687352), (2, 10843676), (4, 5421838), (8, 2710919), (31, 699592), (62, 349796), (124, 174898), (157, 138136), (248, 87449), (314, 69068), (557, 38936), (628, 34534), (1114, 19468), (1256, 17267), (2228, 9734), (4456, 4867)]