21506884

素因数分解:

$2^2\times 7^2\times {\mathrm{197}}^1\times {\mathrm{557}}^1$

素因数の和:772

約数の個数: 36

約数和(自身を含む): 44083116

約数和(自身を除く): 22576232

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 197, 394, 557, 788, 1114, 1379, 2228, 2758, 3899, 5516, 7798, 9653, 15596, 19306, 27293, 38612, 54586, 109172, 109729, 219458, 438916, 768103, 1536206, 3072412, 5376721, 10753442, 21506884]

約数ペア:

[(1, 21506884), (2, 10753442), (4, 5376721), (7, 3072412), (14, 1536206), (28, 768103), (49, 438916), (98, 219458), (196, 109729), (197, 109172), (394, 54586), (557, 38612), (788, 27293), (1114, 19306), (1379, 15596), (2228, 9653), (2758, 7798), (3899, 5516)]