20503203

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:427

約数の個数: 32

約数和(自身を含む): 32693760

約数和(自身を除く): 12190557

約数列:

[1, 3, 7, 21, 29, 87, 131, 203, 257, 393, 609, 771, 917, 1799, 2751, 3799, 5397, 7453, 11397, 22359, 26593, 33667, 52171, 79779, 101001, 156513, 235669, 707007, 976343, 2929029, 6834401, 20503203]

約数ペア:

[(1, 20503203), (3, 6834401), (7, 2929029), (21, 976343), (29, 707007), (87, 235669), (131, 156513), (203, 101001), (257, 79779), (393, 52171), (609, 33667), (771, 26593), (917, 22359), (1799, 11397), (2751, 7453), (3799, 5397)]