21390010

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1093}}^1$

素因数の和:1222

約数の個数: 32

約数和(自身を含む): 40959360

約数和(自身を除く): 19569350

約数列:

[1, 2, 5, 10, 19, 38, 95, 103, 190, 206, 515, 1030, 1093, 1957, 2186, 3914, 5465, 9785, 10930, 19570, 20767, 41534, 103835, 112579, 207670, 225158, 562895, 1125790, 2139001, 4278002, 10695005, 21390010]

約数ペア:

[(1, 21390010), (2, 10695005), (5, 4278002), (10, 2139001), (19, 1125790), (38, 562895), (95, 225158), (103, 207670), (190, 112579), (206, 103835), (515, 41534), (1030, 20767), (1093, 19570), (1957, 10930), (2186, 9785), (3914, 5465)]