21801285

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{277}}^1$

素因数の和:355

約数の個数: 64

約数和(自身を含む): 43234560

約数和(自身を除く): 21433275

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 53, 55, 99, 135, 159, 165, 265, 277, 297, 477, 495, 583, 795, 831, 1385, 1431, 1485, 1749, 2385, 2493, 2915, 3047, 4155, 5247, 7155, 7479, 8745, 9141, 12465, 14681, 15235, 15741, 26235, 27423, 37395, 44043, 45705, 73405, 78705, 82269, 132129, 137115, 161491, 220215, 396387, 411345, 484473, 660645, 807455, 1453419, 1981935, 2422365, 4360257, 7267095, 21801285]

約数ペア:

[(1, 21801285), (3, 7267095), (5, 4360257), (9, 2422365), (11, 1981935), (15, 1453419), (27, 807455), (33, 660645), (45, 484473), (53, 411345), (55, 396387), (99, 220215), (135, 161491), (159, 137115), (165, 132129), (265, 82269), (277, 78705), (297, 73405), (477, 45705), (495, 44043), (583, 37395), (795, 27423), (831, 26235), (1385, 15741), (1431, 15235), (1485, 14681), (1749, 12465), (2385, 9141), (2493, 8745), (2915, 7479), (3047, 7155), (4155, 5247)]