20609253

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{2749}}^1$

素因数の和:2786

約数の個数: 36

約数和(自身を含む): 36679500

約数和(自身を除く): 16070247

約数列:

[1, 3, 7, 9, 17, 21, 49, 51, 63, 119, 147, 153, 357, 441, 833, 1071, 2499, 2749, 7497, 8247, 19243, 24741, 46733, 57729, 134701, 140199, 173187, 327131, 404103, 420597, 981393, 1212309, 2289917, 2944179, 6869751, 20609253]

約数ペア:

[(1, 20609253), (3, 6869751), (7, 2944179), (9, 2289917), (17, 1212309), (21, 981393), (49, 420597), (51, 404103), (63, 327131), (119, 173187), (147, 140199), (153, 134701), (357, 57729), (441, 46733), (833, 24741), (1071, 19243), (2499, 8247), (2749, 7497)]