21663477

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{349}}^1$

素因数の和:399

約数の個数: 48

約数和(自身を含む): 37240000

約数和(自身を除く): 15576523

約数列:

[1, 3, 9, 11, 19, 27, 33, 57, 99, 121, 171, 209, 297, 349, 363, 513, 627, 1047, 1089, 1881, 2299, 3141, 3267, 3839, 5643, 6631, 6897, 9423, 11517, 19893, 20691, 34551, 42229, 59679, 62073, 72941, 103653, 126687, 179037, 218823, 380061, 656469, 802351, 1140183, 1969407, 2407053, 7221159, 21663477]

約数ペア:

[(1, 21663477), (3, 7221159), (9, 2407053), (11, 1969407), (19, 1140183), (27, 802351), (33, 656469), (57, 380061), (99, 218823), (121, 179037), (171, 126687), (209, 103653), (297, 72941), (349, 62073), (363, 59679), (513, 42229), (627, 34551), (1047, 20691), (1089, 19893), (1881, 11517), (2299, 9423), (3141, 6897), (3267, 6631), (3839, 5643)]