21291608

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{2027}}^1$

素因数の和:2147

約数の個数: 32

約数和(自身を含む): 43439760

約数和(自身を除く): 22148152

約数列:

[1, 2, 4, 8, 13, 26, 52, 101, 104, 202, 404, 808, 1313, 2027, 2626, 4054, 5252, 8108, 10504, 16216, 26351, 52702, 105404, 204727, 210808, 409454, 818908, 1637816, 2661451, 5322902, 10645804, 21291608]

約数ペア:

[(1, 21291608), (2, 10645804), (4, 5322902), (8, 2661451), (13, 1637816), (26, 818908), (52, 409454), (101, 210808), (104, 204727), (202, 105404), (404, 52702), (808, 26351), (1313, 16216), (2027, 10504), (2626, 8108), (4054, 5252)]