20643063

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^2\times {\mathrm{389}}^1$

素因数の和:444

約数の個数: 36

約数和(自身を含む): 33878520

約数和(自身を除く): 13235457

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 361, 389, 399, 931, 1083, 1167, 2527, 2723, 2793, 7391, 7581, 8169, 17689, 19061, 22173, 51737, 53067, 57183, 140429, 155211, 362159, 421287, 983003, 1086477, 2949009, 6881021, 20643063]

約数ペア:

[(1, 20643063), (3, 6881021), (7, 2949009), (19, 1086477), (21, 983003), (49, 421287), (57, 362159), (133, 155211), (147, 140429), (361, 57183), (389, 53067), (399, 51737), (931, 22173), (1083, 19061), (1167, 17689), (2527, 8169), (2723, 7581), (2793, 7391)]