21245325

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{877}}^1$

素因数の和:926

約数の個数: 48

約数和(自身を含む): 39193920

約数和(自身を除く): 17948595

約数列:

[1, 3, 5, 15, 17, 19, 25, 51, 57, 75, 85, 95, 255, 285, 323, 425, 475, 877, 969, 1275, 1425, 1615, 2631, 4385, 4845, 8075, 13155, 14909, 16663, 21925, 24225, 44727, 49989, 65775, 74545, 83315, 223635, 249945, 283271, 372725, 416575, 849813, 1118175, 1249725, 1416355, 4249065, 7081775, 21245325]

約数ペア:

[(1, 21245325), (3, 7081775), (5, 4249065), (15, 1416355), (17, 1249725), (19, 1118175), (25, 849813), (51, 416575), (57, 372725), (75, 283271), (85, 249945), (95, 223635), (255, 83315), (285, 74545), (323, 65775), (425, 49989), (475, 44727), (877, 24225), (969, 21925), (1275, 16663), (1425, 14909), (1615, 13155), (2631, 8075), (4385, 4845)]