21891285

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1627}}^1$

素因数の和:1674

約数の個数: 48

約数和(自身を含む): 42666624

約数和(自身を除く): 20775339

約数列:

[1, 3, 5, 9, 13, 15, 23, 39, 45, 65, 69, 115, 117, 195, 207, 299, 345, 585, 897, 1035, 1495, 1627, 2691, 4485, 4881, 8135, 13455, 14643, 21151, 24405, 37421, 63453, 73215, 105755, 112263, 187105, 190359, 317265, 336789, 486473, 561315, 951795, 1459419, 1683945, 2432365, 4378257, 7297095, 21891285]

約数ペア:

[(1, 21891285), (3, 7297095), (5, 4378257), (9, 2432365), (13, 1683945), (15, 1459419), (23, 951795), (39, 561315), (45, 486473), (65, 336789), (69, 317265), (115, 190359), (117, 187105), (195, 112263), (207, 105755), (299, 73215), (345, 63453), (585, 37421), (897, 24405), (1035, 21151), (1495, 14643), (1627, 13455), (2691, 8135), (4485, 4881)]