21250871955

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{340477}}^1$

素因数の和:340580

約数の個数: 48

約数和(自身を含む): 39304780320

約数和(自身を除く): 18053908365

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 73, 95, 171, 219, 285, 365, 657, 855, 1095, 1387, 3285, 4161, 6935, 12483, 20805, 62415, 340477, 1021431, 1702385, 3064293, 5107155, 6469063, 15321465, 19407189, 24854821, 32345315, 58221567, 74564463, 97035945, 124274105, 223693389, 291107835, 372822315, 472241599, 1118466945, 1416724797, 2361207995, 4250174391, 7083623985, 21250871955]

約数ペア:

[(1, 21250871955), (3, 7083623985), (5, 4250174391), (9, 2361207995), (15, 1416724797), (19, 1118466945), (45, 472241599), (57, 372822315), (73, 291107835), (95, 223693389), (171, 124274105), (219, 97035945), (285, 74564463), (365, 58221567), (657, 32345315), (855, 24854821), (1095, 19407189), (1387, 15321465), (3285, 6469063), (4161, 5107155), (6935, 3064293), (12483, 1702385), (20805, 1021431), (62415, 340477)]