20212605

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{293}}^1$

素因数の和:387

約数の個数: 64

約数和(自身を含む): 41771520

約数和(自身を除く): 21558915

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 73, 105, 135, 189, 219, 293, 315, 365, 511, 657, 879, 945, 1095, 1465, 1533, 1971, 2051, 2555, 2637, 3285, 4395, 4599, 6153, 7665, 7911, 9855, 10255, 13185, 13797, 18459, 21389, 22995, 30765, 39555, 55377, 64167, 68985, 92295, 106945, 149723, 192501, 276885, 320835, 449169, 577503, 748615, 962505, 1347507, 2245845, 2887515, 4042521, 6737535, 20212605]

約数ペア:

[(1, 20212605), (3, 6737535), (5, 4042521), (7, 2887515), (9, 2245845), (15, 1347507), (21, 962505), (27, 748615), (35, 577503), (45, 449169), (63, 320835), (73, 276885), (105, 192501), (135, 149723), (189, 106945), (219, 92295), (293, 68985), (315, 64167), (365, 55377), (511, 39555), (657, 30765), (879, 22995), (945, 21389), (1095, 18459), (1465, 13797), (1533, 13185), (1971, 10255), (2051, 9855), (2555, 7911), (2637, 7665), (3285, 6153), (4395, 4599)]