21388185

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1741}}^1$

素因数の和:1775

約数の個数: 64

約数和(自身を含む): 46824960

約数和(自身を除く): 25436775

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 27, 35, 39, 45, 63, 65, 91, 105, 117, 135, 189, 195, 273, 315, 351, 455, 585, 819, 945, 1365, 1741, 1755, 2457, 4095, 5223, 8705, 12187, 12285, 15669, 22633, 26115, 36561, 47007, 60935, 67899, 78345, 109683, 113165, 158431, 182805, 203697, 235035, 329049, 339495, 475293, 548415, 611091, 792155, 1018485, 1425879, 1645245, 2376465, 3055455, 4277637, 7129395, 21388185]

約数ペア:

[(1, 21388185), (3, 7129395), (5, 4277637), (7, 3055455), (9, 2376465), (13, 1645245), (15, 1425879), (21, 1018485), (27, 792155), (35, 611091), (39, 548415), (45, 475293), (63, 339495), (65, 329049), (91, 235035), (105, 203697), (117, 182805), (135, 158431), (189, 113165), (195, 109683), (273, 78345), (315, 67899), (351, 60935), (455, 47007), (585, 36561), (819, 26115), (945, 22633), (1365, 15669), (1741, 12285), (1755, 12187), (2457, 8705), (4095, 5223)]