20217710

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{1097}}^1$

素因数の和:1220

約数の個数: 32

約数和(自身を含む): 38737440

約数和(自身を除く): 18519730

約数列:

[1, 2, 5, 10, 19, 38, 95, 97, 190, 194, 485, 970, 1097, 1843, 2194, 3686, 5485, 9215, 10970, 18430, 20843, 41686, 104215, 106409, 208430, 212818, 532045, 1064090, 2021771, 4043542, 10108855, 20217710]

約数ペア:

[(1, 20217710), (2, 10108855), (5, 4043542), (10, 2021771), (19, 1064090), (38, 532045), (95, 212818), (97, 208430), (190, 106409), (194, 104215), (485, 41686), (970, 20843), (1097, 18430), (1843, 10970), (2194, 9215), (3686, 5485)]