21856905

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{229}}^1$

素因数の和:351

約数の個数: 64

約数和(自身を含む): 45043200

約数和(自身を除く): 23186295

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 101, 105, 135, 189, 229, 303, 315, 505, 687, 707, 909, 945, 1145, 1515, 1603, 2061, 2121, 2727, 3435, 3535, 4545, 4809, 6183, 6363, 8015, 10305, 10605, 13635, 14427, 19089, 23129, 24045, 30915, 31815, 43281, 69387, 72135, 95445, 115645, 161903, 208161, 216405, 346935, 485709, 624483, 809515, 1040805, 1457127, 2428545, 3122415, 4371381, 7285635, 21856905]

約数ペア:

[(1, 21856905), (3, 7285635), (5, 4371381), (7, 3122415), (9, 2428545), (15, 1457127), (21, 1040805), (27, 809515), (35, 624483), (45, 485709), (63, 346935), (101, 216405), (105, 208161), (135, 161903), (189, 115645), (229, 95445), (303, 72135), (315, 69387), (505, 43281), (687, 31815), (707, 30915), (909, 24045), (945, 23129), (1145, 19089), (1515, 14427), (1603, 13635), (2061, 10605), (2121, 10305), (2727, 8015), (3435, 6363), (3535, 6183), (4545, 4809)]