21212175

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 37711872

約数和(自身を除く): 16499697

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 127, 131, 255, 381, 393, 425, 635, 655, 1275, 1905, 1965, 2159, 2227, 3175, 3275, 6477, 6681, 9525, 9825, 10795, 11135, 16637, 32385, 33405, 49911, 53975, 55675, 83185, 161925, 167025, 249555, 282829, 415925, 848487, 1247775, 1414145, 4242435, 7070725, 21212175]

約数ペア:

[(1, 21212175), (3, 7070725), (5, 4242435), (15, 1414145), (17, 1247775), (25, 848487), (51, 415925), (75, 282829), (85, 249555), (127, 167025), (131, 161925), (255, 83185), (381, 55675), (393, 53975), (425, 49911), (635, 33405), (655, 32385), (1275, 16637), (1905, 11135), (1965, 10795), (2159, 9825), (2227, 9525), (3175, 6681), (3275, 6477)]