21286503

素因数分解:

$3^3\times 7^1\times {\mathrm{41}}^2\times {\mathrm{67}}^1$

素因数の和:165

約数の個数: 48

約数和(自身を含む): 37492480

約数和(自身を除く): 16205977

約数列:

[1, 3, 7, 9, 21, 27, 41, 63, 67, 123, 189, 201, 287, 369, 469, 603, 861, 1107, 1407, 1681, 1809, 2583, 2747, 4221, 5043, 7749, 8241, 11767, 12663, 15129, 19229, 24723, 35301, 45387, 57687, 74169, 105903, 112627, 173061, 317709, 337881, 519183, 788389, 1013643, 2365167, 3040929, 7095501, 21286503]

約数ペア:

[(1, 21286503), (3, 7095501), (7, 3040929), (9, 2365167), (21, 1013643), (27, 788389), (41, 519183), (63, 337881), (67, 317709), (123, 173061), (189, 112627), (201, 105903), (287, 74169), (369, 57687), (469, 45387), (603, 35301), (861, 24723), (1107, 19229), (1407, 15129), (1681, 12663), (1809, 11767), (2583, 8241), (2747, 7749), (4221, 5043)]